+ Penlight

author: chai <chaifix@163.com> 2021-10-30 11:32:16 +0800
committer: chai <chaifix@163.com> 2021-10-30 11:32:16 +0800
commit: 42ec7286b2d36a9ba22925f816a17cb1cc2aa5ce (patch)
tree: 24bc7009457a8d7500f264e89946dc20d069294f /Data/Libraries/Penlight/docs
parent: 164885fd98d48703bd771f802d79557b7db97431 (diff)
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Methods">Methods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><strong>pl.Date</strong></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.Date</code></h1>
+<p>Date and Date Format classes.</p>
+<p> See  <a href="../manual/05-dates.md.html#">the Guide</a>.</p>
+
+<p> NOTE: the date module is deprecated! see
+ https://github.com/lunarmodules/Penlight/issues/285</p>
+
+<p> Dependencies: <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../libraries/pl.stringx.html#">pl.stringx</a>, <a href="../libraries/pl.utils.html#">pl.utils</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#Date:set">Date:set (t)</a></td>
+	<td class="summary">set the current time of this Date object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.tzone">Date.tzone (ts)</a></td>
+	<td class="summary">get the time zone offset from UTC.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:toUTC">Date:toUTC ()</a></td>
+	<td class="summary">convert this date to UTC.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:toLocal">Date:toLocal ()</a></td>
+	<td class="summary">convert this UTC date to local.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:year">Date:year (y)</a></td>
+	<td class="summary">set the year.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:month">Date:month (m)</a></td>
+	<td class="summary">set the month.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:day">Date:day (d)</a></td>
+	<td class="summary">set the day.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:hour">Date:hour (h)</a></td>
+	<td class="summary">set the hour.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:min">Date:min (min)</a></td>
+	<td class="summary">set the minutes.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:sec">Date:sec (sec)</a></td>
+	<td class="summary">set the seconds.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:yday">Date:yday (yday)</a></td>
+	<td class="summary">set the day of year.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:year">Date:year (y)</a></td>
+	<td class="summary">get the year.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:month">Date:month ()</a></td>
+	<td class="summary">get the month.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:day">Date:day ()</a></td>
+	<td class="summary">get the day.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:hour">Date:hour ()</a></td>
+	<td class="summary">get the hour.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:min">Date:min ()</a></td>
+	<td class="summary">get the minutes.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:sec">Date:sec ()</a></td>
+	<td class="summary">get the seconds.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:yday">Date:yday ()</a></td>
+	<td class="summary">get the day of year.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:weekday_name">Date:weekday_name (full)</a></td>
+	<td class="summary">name of day of week.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:month_name">Date:month_name (full)</a></td>
+	<td class="summary">name of month.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:is_weekend">Date:is_weekend ()</a></td>
+	<td class="summary">is this day on a weekend?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:add">Date:add (t)</a></td>
+	<td class="summary">add to a date object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:last_day">Date:last_day ()</a></td>
+	<td class="summary">last day of the month.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:diff">Date:diff (other)</a></td>
+	<td class="summary">difference between two Date objects.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:__tostring">Date:__tostring ()</a></td>
+	<td class="summary">long numerical ISO data format version of this date.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:__eq">Date:__eq (other)</a></td>
+	<td class="summary">equality between Date objects.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:__lt">Date:__lt (other)</a></td>
+	<td class="summary">ordering between Date objects.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:__sub">Date:__sub ()</a></td>
+	<td class="summary">difference between Date objects.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date:__add">Date:__add (other)</a></td>
+	<td class="summary">add a date and an interval.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Interval">Date.Interval (t)</a></td>
+	<td class="summary">Date.Interval constructor</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Interval:__tostring">Date.Interval:__tostring ()</a></td>
+	<td class="summary">If it's an interval then the format is '2 hours 29 sec' etc.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Format">Date.Format (fmt.)</a></td>
+	<td class="summary">Date.Format constructor.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Format:parse">Date.Format:parse (str)</a></td>
+	<td class="summary">parse a string into a Date object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Format:tostring">Date.Format:tostring (d)</a></td>
+	<td class="summary">convert a Date object into a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Date.Format:US_order">Date.Format:US_order (yesno)</a></td>
+	<td class="summary">force US order in dates like 9/11/2001</td>
+	</tr>
+</table>
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Date:Date">pl.Date:Date (t, ...)</a></td>
+	<td class="summary">Date constructor.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "Date:set"></a>
+    <strong>Date:set (t)</strong>
+    </dt>
+    <dd>
+    set the current time of this Date object.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">int</span></span>
+         seconds since epoch
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.tzone"></a>
+    <strong>Date.tzone (ts)</strong>
+    </dt>
+    <dd>
+    get the time zone offset from UTC.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">ts</span>
+            <span class="types"><span class="type">int</span></span>
+         seconds ahead of UTC
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:toUTC"></a>
+    <strong>Date:toUTC ()</strong>
+    </dt>
+    <dd>
+    convert this date to UTC.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:toLocal"></a>
+    <strong>Date:toLocal ()</strong>
+    </dt>
+    <dd>
+    convert this UTC date to local.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:year"></a>
+    <strong>Date:year (y)</strong>
+    </dt>
+    <dd>
+    set the year.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">y</span>
+            <span class="types"><span class="type">int</span></span>
+         Four-digit year
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:month"></a>
+    <strong>Date:month (m)</strong>
+    </dt>
+    <dd>
+    set the month.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">m</span>
+            <span class="types"><span class="type">int</span></span>
+         month
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:day"></a>
+    <strong>Date:day (d)</strong>
+    </dt>
+    <dd>
+    set the day.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">d</span>
+            <span class="types"><span class="type">int</span></span>
+         day
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:hour"></a>
+    <strong>Date:hour (h)</strong>
+    </dt>
+    <dd>
+    set the hour.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">h</span>
+            <span class="types"><span class="type">int</span></span>
+         hour
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:min"></a>
+    <strong>Date:min (min)</strong>
+    </dt>
+    <dd>
+    set the minutes.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">min</span>
+            <span class="types"><span class="type">int</span></span>
+         minutes
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:sec"></a>
+    <strong>Date:sec (sec)</strong>
+    </dt>
+    <dd>
+    set the seconds.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">sec</span>
+            <span class="types"><span class="type">int</span></span>
+         seconds
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:yday"></a>
+    <strong>Date:yday (yday)</strong>
+    </dt>
+    <dd>
+    set the day of year.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">yday</span>
+            <span class="types"><span class="type">int</span></span>
+         day of year
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:year"></a>
+    <strong>Date:year (y)</strong>
+    </dt>
+    <dd>
+    get the year.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">y</span>
+            <span class="types"><span class="type">int</span></span>
+         Four-digit year
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:month"></a>
+    <strong>Date:month ()</strong>
+    </dt>
+    <dd>
+    get the month.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:day"></a>
+    <strong>Date:day ()</strong>
+    </dt>
+    <dd>
+    get the day.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:hour"></a>
+    <strong>Date:hour ()</strong>
+    </dt>
+    <dd>
+    get the hour.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:min"></a>
+    <strong>Date:min ()</strong>
+    </dt>
+    <dd>
+    get the minutes.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:sec"></a>
+    <strong>Date:sec ()</strong>
+    </dt>
+    <dd>
+    get the seconds.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:yday"></a>
+    <strong>Date:yday ()</strong>
+    </dt>
+    <dd>
+    get the day of year.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:weekday_name"></a>
+    <strong>Date:weekday_name (full)</strong>
+    </dt>
+    <dd>
+    name of day of week.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">full</span>
+            <span class="types"><span class="type">bool</span></span>
+         abbreviated if true, full otherwise.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        name
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:month_name"></a>
+    <strong>Date:month_name (full)</strong>
+    </dt>
+    <dd>
+    name of month.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">full</span>
+            <span class="types"><span class="type">int</span></span>
+         abbreviated if true, full otherwise.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        name
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:is_weekend"></a>
+    <strong>Date:is_weekend ()</strong>
+    </dt>
+    <dd>
+    is this day on a weekend?.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:add"></a>
+    <strong>Date:add (t)</strong>
+    </dt>
+    <dd>
+    add to a date object.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         a table containing one of the following keys and a value:
+ one of <a href="../classes/pl.Date.html#Date:year">year</a>,<a href="../classes/pl.Date.html#Date:month">month</a>,<a href="../classes/pl.Date.html#Date:day">day</a>,<a href="../classes/pl.Date.html#Date:hour">hour</a>,<a href="../classes/pl.Date.html#Date:min">min</a>,<a href="../classes/pl.Date.html#Date:sec">sec</a>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        this date
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:last_day"></a>
+    <strong>Date:last_day ()</strong>
+    </dt>
+    <dd>
+    last day of the month.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        int day
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:diff"></a>
+    <strong>Date:diff (other)</strong>
+    </dt>
+    <dd>
+    difference between two Date objects.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">other</span>
+            <span class="types"><a class="type" href="../classes/pl.Date.html">Date</a></span>
+         Date object
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="../classes/pl.Date.html#Date.Interval">Date.Interval</a></span>
+        object
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:__tostring"></a>
+    <strong>Date:__tostring ()</strong>
+    </dt>
+    <dd>
+    long numerical ISO data format version of this date.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:__eq"></a>
+    <strong>Date:__eq (other)</strong>
+    </dt>
+    <dd>
+    equality between Date objects.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">other</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:__lt"></a>
+    <strong>Date:__lt (other)</strong>
+    </dt>
+    <dd>
+    ordering between Date objects.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">other</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:__sub"></a>
+    <strong>Date:__sub ()</strong>
+    </dt>
+    <dd>
+    difference between Date objects.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date:__add"></a>
+    <strong>Date:__add (other)</strong>
+    </dt>
+    <dd>
+    add a date and an interval.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">other</span>
+         either a <a href="../classes/pl.Date.html#Date.Interval">Date.Interval</a> object or a table such as
+ passed to <a href="../classes/pl.Date.html#Date:add">Date:add</a>
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.Interval"></a>
+    <strong>Date.Interval (t)</strong>
+    </dt>
+    <dd>
+    Date.Interval constructor
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">int</span></span>
+         an interval in seconds
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.Interval:__tostring"></a>
+    <strong>Date.Interval:__tostring ()</strong>
+    </dt>
+    <dd>
+    If it's an interval then the format is '2 hours 29 sec' etc.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.Format"></a>
+    <strong>Date.Format (fmt.)</strong>
+    </dt>
+    <dd>
+    Date.Format constructor.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fmt.</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A string where the following fields are significant:</p>
+
+<ul>
+    <li>d day (either d or dd)</li>
+    <li>y year (either yy or yyy)</li>
+    <li>m month (either m or mm)</li>
+    <li>H hour (either H or HH)</li>
+    <li>M minute (either M or MM)</li>
+    <li>S second (either S or SS)</li>
+</ul>
+
+<p> Alternatively, if fmt is nil then this returns a flexible date parser
+ that tries various date/time schemes in turn:</p>
+
+<ul>
+    <li><a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>, like <code>2010-05-10 12:35:23Z</code> or <code>2008-10-03T14:30+02</code></li>
+    <li>times like 15:30 or 8.05pm  (assumed to be today's date)</li>
+    <li>dates like 28/10/02 (European order!) or 5 Feb 2012</li>
+    <li>month name like march or Mar (case-insensitive, first 3 letters); here the
+    day will be 1 and the year this current year</li>
+</ul>
+
+<p> A date in format 3 can be optionally followed by a time in format 2.
+ Please see test-date.lua in the tests folder for more examples.
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">df = Date.Format(<span class="string">"yyyy-mm-dd HH:MM:SS"</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "Date.Format:parse"></a>
+    <strong>Date.Format:parse (str)</strong>
+    </dt>
+    <dd>
+    parse a string into a Date object.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">str</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a date string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        date object
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.Format:tostring"></a>
+    <strong>Date.Format:tostring (d)</strong>
+    </dt>
+    <dd>
+    convert a Date object into a string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">d</span>
+         a date object, or a time value as returned by <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.time">os.time</a>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Date.Format:US_order"></a>
+    <strong>Date.Format:US_order (yesno)</strong>
+    </dt>
+    <dd>
+    force US order in dates like 9/11/2001
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">yesno</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Date:Date"></a>
+    <strong>pl.Date:Date (t, ...)</strong>
+    </dt>
+    <dd>
+    Date constructor.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+
+<p> this can be either</p>
+
+<ul>
+    <li><code>nil</code> or empty - use current date and time</li>
+    <li>number - seconds since epoch (as returned by <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.time">os.time</a>). Resulting time is UTC</li>
+    <li><a href="../classes/pl.Date.html">Date</a> - make a copy of this date</li>
+    <li>table - table containing year, month, etc as for <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.time">os.time</a>. You may leave out year, month or day,
+    in which case current values will be used.</li>
+    <li>year (will be followed by month, day etc)</li>
+</ul>
+
+
+        </li>
+        <li><span class="parameter">...</span>
+          true if  Universal Coordinated Time, or two to five numbers: month,day,hour,min,sec
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/classes/pl.List.html b/Data/Libraries/Penlight/docs/classes/pl.List.html
new file mode 100644
index 0000000..b84209f
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/classes/pl.List.html
@@ -0,0 +1,1443 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#metamethods">metamethods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><strong>pl.List</strong></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.List</code></h1>
+<p>Python-style list class.</p>
+<p> <strong>Please Note</strong>: methods that change the list will return the list.
+ This is to allow for method chaining, but please note that <code>ls = ls:sort()</code>
+ does not mean that a new copy of the list is made. In-place (mutable) methods
+ are marked as returning 'the list' in this documentation.</p>
+
+<p> See the Guide for further <a href="../manual/02-arrays.md.html#Python_style_Lists">discussion</a></p>
+
+<p> See <a href="http://www.python.org/doc/current/tut/tut.html">http://www.python.org/doc/current/tut/tut.html</a>, section 5.1</p>
+
+<p> <strong>Note</strong>: The comments before some of the functions are from the Python docs
+ and contain Python code.</p>
+
+<p> Written for Lua version Nick Trout 4.0; Redone for Lua 5.1, Steve Donovan.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.class.html#">pl.class</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#List.new">List.new ([t])</a></td>
+	<td class="summary">Create a new list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:clone">List:clone ()</a></td>
+	<td class="summary">Make a copy of an existing list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:append">List:append (i)</a></td>
+	<td class="summary">Add an item to the end of the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:extend">List:extend (L)</a></td>
+	<td class="summary">Extend the list by appending all the items in the given list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:insert">List:insert (i, x)</a></td>
+	<td class="summary">Insert an item at a given position.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:put">List:put (x)</a></td>
+	<td class="summary">Insert an item at the begining of the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:remove">List:remove (i)</a></td>
+	<td class="summary">Remove an element given its index.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:remove_value">List:remove_value (x)</a></td>
+	<td class="summary">Remove the first item from the list whose value is given.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:pop">List:pop ([i])</a></td>
+	<td class="summary">Remove the item at the given position in the list, and return it.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:index">List:index (x[, idx=1])</a></td>
+	<td class="summary">Return the index in the list of the first item whose value is given.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:contains">List:contains (x)</a></td>
+	<td class="summary">Does this list contain the value?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:count">List:count (x)</a></td>
+	<td class="summary">Return the number of times value appears in the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:sort">List:sort ([cmp='<'])</a></td>
+	<td class="summary">Sort the items of the list, in place.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:sorted">List:sorted ([cmp='<'])</a></td>
+	<td class="summary">Return a sorted copy of this list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:reverse">List:reverse ()</a></td>
+	<td class="summary">Reverse the elements of the list, in place.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:minmax">List:minmax ()</a></td>
+	<td class="summary">Return the minimum and the maximum value of the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:slice">List:slice (first, last)</a></td>
+	<td class="summary">Emulate list slicing.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:clear">List:clear ()</a></td>
+	<td class="summary">Empty the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List.range">List.range (start[, finish[, incr=1]])</a></td>
+	<td class="summary">Emulate Python's range(x) function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:len">List:len ()</a></td>
+	<td class="summary">list:len() is the same as #list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:chop">List:chop (i1, i2)</a></td>
+	<td class="summary">Remove a subrange of elements.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:splice">List:splice (idx, list)</a></td>
+	<td class="summary">Insert a sublist into a list
+ equivalent to 's[idx:idx] = list' in Python</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:slice_assign">List:slice_assign (i1, i2, seq)</a></td>
+	<td class="summary">General slice assignment s[i1:i2] = seq.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:join">List:join ([delim=''])</a></td>
+	<td class="summary">Join the elements of a list using a delimiter.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:concat">List:concat ([delim=''])</a></td>
+	<td class="summary">Join a list of strings.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:foreach">List:foreach (fun, ...)</a></td>
+	<td class="summary">Call the function on each element of the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:foreachm">List:foreachm (name, ...)</a></td>
+	<td class="summary">Call the named method on each element of the list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:filter">List:filter (fun[, arg])</a></td>
+	<td class="summary">Create a list of all elements which match a function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List.split">List.split (s[, delim])</a></td>
+	<td class="summary">Split a string using a delimiter.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:map">List:map (fun, ...)</a></td>
+	<td class="summary">Apply a function to all elements.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:transform">List:transform (fun, ...)</a></td>
+	<td class="summary">Apply a function to all elements, in-place.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:map2">List:map2 (fun, ls, ...)</a></td>
+	<td class="summary">Apply a function to elements of two lists.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:mapm">List:mapm (name, ...)</a></td>
+	<td class="summary">apply a named method to all elements.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:reduce">List:reduce (fun)</a></td>
+	<td class="summary">'reduce' a list using a binary function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:partition">List:partition (fun, ...)</a></td>
+	<td class="summary">Partition a list using a classifier function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:iter">List:iter ()</a></td>
+	<td class="summary">return an iterator over all values.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List.iterate">List.iterate (seq)</a></td>
+	<td class="summary">Create an iterator over a seqence.</td>
+	</tr>
+</table>
+<h2><a href="#metamethods">metamethods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#List:__concat">List:__concat (L)</a></td>
+	<td class="summary">Concatenation operator.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:__eq">List:__eq (L)</a></td>
+	<td class="summary">Equality operator ==.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#List:__tostring">List:__tostring ()</a></td>
+	<td class="summary">How our list should be rendered as a string.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "List.new"></a>
+    <strong>List.new ([t])</strong>
+    </dt>
+    <dd>
+    Create a new list.  Can optionally pass a table;
+ passing another instance of List will cause a copy to be created;
+ this will return a plain table with an appropriate metatable.
+ we pass anything which isn't a simple table to iterate() to work out
+ an appropriate iterator
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         An optional list-like table
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new List
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../classes/pl.List.html#List.iterate">List.iterate</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">ls = List();  ls = List {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "List:clone"></a>
+    <strong>List:clone ()</strong>
+    </dt>
+    <dd>
+    Make a copy of an existing list.
+ The difference from a plain 'copy constructor' is that this returns
+ the actual List subtype.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:append"></a>
+    <strong>List:append (i)</strong>
+    </dt>
+    <dd>
+    Add an item to the end of the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i</span>
+         An item
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:extend"></a>
+    <strong>List:extend (L)</strong>
+    </dt>
+    <dd>
+    Extend the list by appending all the items in the given list.
+ equivalent to 'a[len(a):] = L'.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">L</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         Another List
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:insert"></a>
+    <strong>List:insert (i, x)</strong>
+    </dt>
+    <dd>
+    Insert an item at a given position.  i is the index of the
+ element before which to insert.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i</span>
+            <span class="types"><span class="type">int</span></span>
+         index of element before whichh to insert
+        </li>
+        <li><span class="parameter">x</span>
+         A data item
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:put"></a>
+    <strong>List:put (x)</strong>
+    </dt>
+    <dd>
+    Insert an item at the begining of the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         a data item
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:remove"></a>
+    <strong>List:remove (i)</strong>
+    </dt>
+    <dd>
+    Remove an element given its index.
+ (equivalent of Python's del s[i])
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i</span>
+            <span class="types"><span class="type">int</span></span>
+         the index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:remove_value"></a>
+    <strong>List:remove_value (x)</strong>
+    </dt>
+    <dd>
+    Remove the first item from the list whose value is given.
+ (This is called 'remove' in Python; renamed to avoid confusion
+ with table.remove)
+ Return nil if there is no such item.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         A data value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:pop"></a>
+    <strong>List:pop ([i])</strong>
+    </dt>
+    <dd>
+    Remove the item at the given position in the list, and return it.
+ If no index is specified, a:pop() returns the last item in the list.
+ The item is also removed from the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i</span>
+            <span class="types"><span class="type">int</span></span>
+         An index
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the item
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:index"></a>
+    <strong>List:index (x[, idx=1])</strong>
+    </dt>
+    <dd>
+    Return the index in the list of the first item whose value is given.
+ Return nil if there is no such item.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         A data value
+        </li>
+        <li><span class="parameter">idx</span>
+            <span class="types"><span class="type">int</span></span>
+         where to start search
+         (<em>default</em> 1)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the index, or nil if not found.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:contains"></a>
+    <strong>List:contains (x)</strong>
+    </dt>
+    <dd>
+    Does this list contain the value?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         A data value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:count"></a>
+    <strong>List:count (x)</strong>
+    </dt>
+    <dd>
+    Return the number of times value appears in the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         A data value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        number of times x appears
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:sort"></a>
+    <strong>List:sort ([cmp='<'])</strong>
+    </dt>
+    <dd>
+    Sort the items of the list, in place.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         an optional comparison function
+         (<em>default</em> '<')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:sorted"></a>
+    <strong>List:sorted ([cmp='<'])</strong>
+    </dt>
+    <dd>
+    Return a sorted copy of this list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         an optional comparison function
+         (<em>default</em> '<')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:reverse"></a>
+    <strong>List:reverse ()</strong>
+    </dt>
+    <dd>
+    Reverse the elements of the list, in place.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:minmax"></a>
+    <strong>List:minmax ()</strong>
+    </dt>
+    <dd>
+    Return the minimum and the maximum value of the list.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        minimum value</li>
+        <li>
+        maximum value</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:slice"></a>
+    <strong>List:slice (first, last)</strong>
+    </dt>
+    <dd>
+    Emulate list slicing.   like  'list[first:last]' in Python.
+ If first or last are negative then they are relative to the end of the list
+ eg. slice(-2) gives last 2 entries in a list, and
+ slice(-4,-2) gives from -4th to -2nd
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">first</span>
+         An index
+        </li>
+        <li><span class="parameter">last</span>
+         An index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new List
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:clear"></a>
+    <strong>List:clear ()</strong>
+    </dt>
+    <dd>
+    Empty the list.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List.range"></a>
+    <strong>List.range (start[, finish[, incr=1]])</strong>
+    </dt>
+    <dd>
+    Emulate Python's range(x) function.
+ Include it in List table for tidiness
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">start</span>
+            <span class="types"><span class="type">int</span></span>
+         A number
+        </li>
+        <li><span class="parameter">finish</span>
+            <span class="types"><span class="type">int</span></span>
+         A number greater than start; if absent,
+ then start is 1 and finish is start
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">incr</span>
+            <span class="types"><span class="type">int</span></span>
+         an increment (may be less than 1)
+         (<em>default</em> 1)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a List from start .. finish
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">List.range(<span class="number">0</span>,<span class="number">3</span>) == List{<span class="number">0</span>,<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}</pre></li>
+        <li><pre class="example">List.range(<span class="number">4</span>) = List{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>}</pre></li>
+        <li><pre class="example">List.range(<span class="number">5</span>,<span class="number">1</span>,-<span class="number">1</span>) == List{<span class="number">5</span>,<span class="number">4</span>,<span class="number">3</span>,<span class="number">2</span>,<span class="number">1</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "List:len"></a>
+    <strong>List:len ()</strong>
+    </dt>
+    <dd>
+    list:len() is the same as #list.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:chop"></a>
+    <strong>List:chop (i1, i2)</strong>
+    </dt>
+    <dd>
+    Remove a subrange of elements.
+ equivalent to 'del s[i1:i2]' in Python.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start of range
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end of range
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:splice"></a>
+    <strong>List:splice (idx, list)</strong>
+    </dt>
+    <dd>
+    Insert a sublist into a list
+ equivalent to 's[idx:idx] = list' in Python
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">idx</span>
+            <span class="types"><span class="type">int</span></span>
+         index
+        </li>
+        <li><span class="parameter">list</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         list to insert
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">l = List{<span class="number">10</span>,<span class="number">20</span>}; l:splice(<span class="number">2</span>,{<span class="number">21</span>,<span class="number">22</span>});  <span class="global">assert</span>(l == List{<span class="number">10</span>,<span class="number">21</span>,<span class="number">22</span>,<span class="number">20</span>})</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "List:slice_assign"></a>
+    <strong>List:slice_assign (i1, i2, seq)</strong>
+    </dt>
+    <dd>
+    General slice assignment s[i1:i2] = seq.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+          start index
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+          end index
+        </li>
+        <li><span class="parameter">seq</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         a list
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:join"></a>
+    <strong>List:join ([delim=''])</strong>
+    </dt>
+    <dd>
+    Join the elements of a list using a delimiter.
+ This method uses tostring on all elements.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a delimiter string, can be empty.
+         (<em>default</em> '')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:concat"></a>
+    <strong>List:concat ([delim=''])</strong>
+    </dt>
+    <dd>
+    Join a list of strings.  <br>
+ Uses <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.concat">table.concat</a> directly.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a delimiter
+         (<em>default</em> '')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:foreach"></a>
+    <strong>List:foreach (fun, ...)</strong>
+    </dt>
+    <dd>
+    Call the function on each element of the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function or callable object
+        </li>
+        <li><span class="parameter">...</span>
+         optional values to pass to function
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:foreachm"></a>
+    <strong>List:foreachm (name, ...)</strong>
+    </dt>
+    <dd>
+    Call the named method on each element of the list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the method name
+        </li>
+        <li><span class="parameter">...</span>
+         optional values to pass to function
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:filter"></a>
+    <strong>List:filter (fun[, arg])</strong>
+    </dt>
+    <dd>
+    Create a list of all elements which match a function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a boolean function
+        </li>
+        <li><span class="parameter">arg</span>
+         optional argument to be passed as second argument of the predicate
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new filtered list.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List.split"></a>
+    <strong>List.split (s[, delim])</strong>
+    </dt>
+    <dd>
+    Split a string using a delimiter.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the delimiter (default spaces)
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a List of strings
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#split">pl.utils.split</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "List:map"></a>
+    <strong>List:map (fun, ...)</strong>
+    </dt>
+    <dd>
+    Apply a function to all elements.
+ Any extra arguments will be passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+        <li><span class="parameter">...</span>
+         arbitrary extra arguments.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list: {f(x) for x in self}
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#imap">pl.tablex.imap</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">List{<span class="string">'one'</span>,<span class="string">'two'</span>}:map(<span class="global">string</span>.upper) == {<span class="string">'ONE'</span>,<span class="string">'TWO'</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "List:transform"></a>
+    <strong>List:transform (fun, ...)</strong>
+    </dt>
+    <dd>
+    Apply a function to all elements, in-place.
+ Any extra arguments are passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         A function that takes at least one argument
+        </li>
+        <li><span class="parameter">...</span>
+         arbitrary extra arguments.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the list.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:map2"></a>
+    <strong>List:map2 (fun, ls, ...)</strong>
+    </dt>
+    <dd>
+    Apply a function to elements of two lists.
+ Any extra arguments will be passed to the function
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least two arguments
+        </li>
+        <li><span class="parameter">ls</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         another list
+        </li>
+        <li><span class="parameter">...</span>
+         arbitrary extra arguments.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list: {f(x,y) for x in self, for x in arg1}
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#imap2">pl.tablex.imap2</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "List:mapm"></a>
+    <strong>List:mapm (name, ...)</strong>
+    </dt>
+    <dd>
+    apply a named method to all elements.
+ Any extra arguments will be passed to the method.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         name of method
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list of the results
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.seq.html#mapmethod">pl.seq.mapmethod</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "List:reduce"></a>
+    <strong>List:reduce (fun)</strong>
+    </dt>
+    <dd>
+    'reduce' a list using a binary function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of two arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        result of the function
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#reduce">pl.tablex.reduce</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "List:partition"></a>
+    <strong>List:partition (fun, ...)</strong>
+    </dt>
+    <dd>
+    Partition a list using a classifier function.
+ The function may return nil, but this will be converted to the string key '<nil>'.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+        <li><span class="parameter">...</span>
+         will also be passed to the function
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="../classes/pl.MultiMap.html">MultiMap</a></span>
+        a table where the keys are the returned values, and the values are Lists
+ of values where the function returned that key.
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../classes/pl.MultiMap.html#">pl.MultiMap</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "List:iter"></a>
+    <strong>List:iter ()</strong>
+    </dt>
+    <dd>
+    return an iterator over all values.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List.iterate"></a>
+    <strong>List.iterate (seq)</strong>
+    </dt>
+    <dd>
+    Create an iterator over a seqence.
+ This captures the Python concept of 'sequence'.
+ For tables, iterates over all values with integer indices.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">seq</span>
+         a sequence; a string (over characters), a table, a file object (over lines) or an iterator function
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example"><span class="keyword">for</span> x <span class="keyword">in</span> iterate {<span class="number">1</span>,<span class="number">10</span>,<span class="number">22</span>,<span class="number">55</span>} <span class="keyword">do</span> <span class="global">io</span>.write(x,<span class="string">','</span>) <span class="keyword">end</span> ==&gt; <span class="number">1</span>,<span class="number">10</span>,<span class="number">22</span>,<span class="number">55</span></pre></li>
+        <li><pre class="example"><span class="keyword">for</span> ch <span class="keyword">in</span> iterate <span class="string">'help'</span> <span class="keyword">do</span> <span class="keyword">do</span> <span class="global">io</span>.write(ch,<span class="string">' '</span>) <span class="keyword">end</span> ==&gt; h e l p</pre></li>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="metamethods"></a>metamethods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "List:__concat"></a>
+    <strong>List:__concat (L)</strong>
+    </dt>
+    <dd>
+    Concatenation operator.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">L</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         another List
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list consisting of the list with the elements of the new list appended
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:__eq"></a>
+    <strong>List:__eq (L)</strong>
+    </dt>
+    <dd>
+    Equality operator ==.   True iff all elements of two lists are equal.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">L</span>
+            <span class="types"><a class="type" href="../classes/pl.List.html">List</a></span>
+         another List
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "List:__tostring"></a>
+    <strong>List:__tostring ()</strong>
+    </dt>
+    <dd>
+    How our list should be rendered as a string.  Uses join().
+
+
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../classes/pl.List.html#List:join">List:join</a>
+    </ul>
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/classes/pl.Map.html b/Data/Libraries/Penlight/docs/classes/pl.Map.html
new file mode 100644
index 0000000..72b4b40
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/classes/pl.Map.html
@@ -0,0 +1,454 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Fields">Fields</a></li>
+<li><a href="#Methods">Methods</a></li>
+<li><a href="#Metamethods">Metamethods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><strong>pl.Map</strong></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.Map</code></h1>
+<p>A Map class.</p>
+<p>
+
+
+
+<pre>
+&gt; Map = <span class="global">require</span> <span class="string">'pl.Map'</span>
+&gt; m = Map{one=<span class="number">1</span>,two=<span class="number">2</span>}
+&gt; m:update {three=<span class="number">3</span>,four=<span class="number">4</span>,two=<span class="number">20</span>}
+&gt; = m == M{one=<span class="number">1</span>,two=<span class="number">20</span>,three=<span class="number">3</span>,four=<span class="number">4</span>}
+<span class="keyword">true</span>
+</pre>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.pretty.html#">pl.pretty</a></p>
+</p>
+
+
+<h2><a href="#Fields">Fields</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map.keys">pl.Map.keys</a></td>
+	<td class="summary">list of keys.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map.values">pl.Map.values</a></td>
+	<td class="summary">list of values.</td>
+	</tr>
+</table>
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:iter">pl.Map:iter ()</a></td>
+	<td class="summary">return an iterator over all key-value pairs.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:items">pl.Map:items ()</a></td>
+	<td class="summary">return a List of all key-value pairs, sorted by the keys.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:setdefault">pl.Map:setdefault (key, default)</a></td>
+	<td class="summary">set a value in the map if it doesn't exist yet.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:len">pl.Map:len ()</a></td>
+	<td class="summary">size of map.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:set">pl.Map:set (key, val)</a></td>
+	<td class="summary">put a value into the map.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:get">pl.Map:get (key)</a></td>
+	<td class="summary">get a value from the map.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:getvalues">pl.Map:getvalues (keys)</a></td>
+	<td class="summary">get a list of values indexed by a list of keys.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:update">pl.Map:update (table)</a></td>
+	<td class="summary">update the map using key/value pairs from another table.</td>
+	</tr>
+</table>
+<h2><a href="#Metamethods">Metamethods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:__eq">pl.Map:__eq (m)</a></td>
+	<td class="summary">equality between maps.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Map:__tostring">pl.Map:__tostring ()</a></td>
+	<td class="summary">string representation of a map.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Fields"></a>Fields</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Map.keys"></a>
+    <strong>pl.Map.keys</strong>
+    </dt>
+    <dd>
+    list of keys.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map.values"></a>
+    <strong>pl.Map.values</strong>
+    </dt>
+    <dd>
+    list of values.
+
+
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Map:iter"></a>
+    <strong>pl.Map:iter ()</strong>
+    </dt>
+    <dd>
+    return an iterator over all key-value pairs.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:items"></a>
+    <strong>pl.Map:items ()</strong>
+    </dt>
+    <dd>
+    return a List of all key-value pairs, sorted by the keys.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:setdefault"></a>
+    <strong>pl.Map:setdefault (key, default)</strong>
+    </dt>
+    <dd>
+    set a value in the map if it doesn't exist yet.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+        <li><span class="parameter">default</span>
+         value to set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the value stored in the map (existing value, or the new value)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:len"></a>
+    <strong>pl.Map:len ()</strong>
+    </dt>
+    <dd>
+    size of map.
+ note: this is a relatively expensive operation!
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:set"></a>
+    <strong>pl.Map:set (key, val)</strong>
+    </dt>
+    <dd>
+    put a value into the map.
+ This will remove the key if the value is <code>nil</code>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+        <li><span class="parameter">val</span>
+         the value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:get"></a>
+    <strong>pl.Map:get (key)</strong>
+    </dt>
+    <dd>
+    get a value from the map.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the value, or nil if not found.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:getvalues"></a>
+    <strong>pl.Map:getvalues (keys)</strong>
+    </dt>
+    <dd>
+    get a list of values indexed by a list of keys.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">keys</span>
+         a list-like table of keys
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:update"></a>
+    <strong>pl.Map:update (table)</strong>
+    </dt>
+    <dd>
+    update the map using key/value pairs from another table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">table</span>
+            <span class="types"><span class="type">tab</span></span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Metamethods"></a>Metamethods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Map:__eq"></a>
+    <strong>pl.Map:__eq (m)</strong>
+    </dt>
+    <dd>
+    equality between maps.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">m</span>
+            <span class="types"><a class="type" href="../classes/pl.Map.html">Map</a></span>
+         another map.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Map:__tostring"></a>
+    <strong>pl.Map:__tostring ()</strong>
+    </dt>
+    <dd>
+    string representation of a map.
+
+
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/classes/pl.MultiMap.html b/Data/Libraries/Penlight/docs/classes/pl.MultiMap.html
new file mode 100644
index 0000000..b711b54
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/classes/pl.MultiMap.html
@@ -0,0 +1,207 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Methods">Methods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><strong>pl.MultiMap</strong></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.MultiMap</code></h1>
+<p>MultiMap, a Map which has multiple values per key.</p>
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../classes/pl.List.html#">pl.List</a>, <a href="../classes/pl.Map.html#">pl.Map</a></p>
+
+
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.MultiMap:update">pl.MultiMap:update (t)</a></td>
+	<td class="summary">update a MultiMap using a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.MultiMap:set">pl.MultiMap:set (key, val)</a></td>
+	<td class="summary">add a new value to a key.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.MultiMap:update"></a>
+    <strong>pl.MultiMap:update (t)</strong>
+    </dt>
+    <dd>
+    update a MultiMap using a table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         either a Multimap or a map-like table.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the map
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.MultiMap:set"></a>
+    <strong>pl.MultiMap:set (key, val)</strong>
+    </dt>
+    <dd>
+    add a new value to a key.   Setting a nil value removes the key.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+        <li><span class="parameter">val</span>
+         the value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the map
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/classes/pl.OrderedMap.html b/Data/Libraries/Penlight/docs/classes/pl.OrderedMap.html
new file mode 100644
index 0000000..537af37
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/classes/pl.OrderedMap.html
@@ -0,0 +1,417 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Methods">Methods</a></li>
+<li><a href="#Metamethods">Metamethods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><strong>pl.OrderedMap</strong></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.OrderedMap</code></h1>
+<p>OrderedMap, a map which preserves ordering.</p>
+<p> Derived from <a href="../classes/pl.Map.html#">pl.Map</a>.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../classes/pl.List.html#">pl.List</a>, <a href="../classes/pl.Map.html#">pl.Map</a></p>
+
+
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:_init">pl.OrderedMap:_init (t)</a></td>
+	<td class="summary">construct an OrderedMap.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:update">pl.OrderedMap:update (t)</a></td>
+	<td class="summary">update an OrderedMap using a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:set">pl.OrderedMap:set (key, val)</a></td>
+	<td class="summary">set the key's value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:insert">pl.OrderedMap:insert (pos, key, val)</a></td>
+	<td class="summary">insert a key/value pair before a given position.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:keys">pl.OrderedMap:keys ()</a></td>
+	<td class="summary">return the keys in order.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:values">pl.OrderedMap:values ()</a></td>
+	<td class="summary">return the values in order.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:sort">pl.OrderedMap:sort (cmp)</a></td>
+	<td class="summary">sort the keys.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:iter">pl.OrderedMap:iter ()</a></td>
+	<td class="summary">iterate over key-value pairs in order.</td>
+	</tr>
+</table>
+<h2><a href="#Metamethods">Metamethods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:__pairs">pl.OrderedMap:__pairs ()</a></td>
+	<td class="summary">iterate over an ordered map (5.2).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.OrderedMap:__tostring">pl.OrderedMap:__tostring ()</a></td>
+	<td class="summary">string representation of an ordered map.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.OrderedMap:_init"></a>
+    <strong>pl.OrderedMap:_init (t)</strong>
+    </dt>
+    <dd>
+    construct an OrderedMap.
+ Will throw an error if the argument is bad.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         optional initialization table, same as for <a href="../classes/pl.OrderedMap.html#pl.OrderedMap:update">OrderedMap:update</a>
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:update"></a>
+    <strong>pl.OrderedMap:update (t)</strong>
+    </dt>
+    <dd>
+    update an OrderedMap using a table.
+ If the table is itself an OrderedMap, then its entries will be appended.
+ if it s a table of the form <code>{{key1=val1},{key2=val2},...}</code> these will be appended.</p>
+
+<p> Otherwise, it is assumed to be a map-like table, and order of extra entries is arbitrary.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        the map, or nil in case of error</li>
+        <li>
+        the error message</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:set"></a>
+    <strong>pl.OrderedMap:set (key, val)</strong>
+    </dt>
+    <dd>
+    set the key's value.    This key will be appended at the end of the map.</p>
+
+<p> If the value is nil, then the key is removed.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+        <li><span class="parameter">val</span>
+         the value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the map
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:insert"></a>
+    <strong>pl.OrderedMap:insert (pos, key, val)</strong>
+    </dt>
+    <dd>
+    insert a key/value pair before a given position.
+ Note: if the map already contains the key, then this effectively
+ moves the item to the new position by first removing at the old position.
+ Has no effect if the key does not exist and val is nil
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">pos</span>
+            <span class="types"><span class="type">int</span></span>
+         a position starting at 1
+        </li>
+        <li><span class="parameter">key</span>
+         the key
+        </li>
+        <li><span class="parameter">val</span>
+         the value; if nil use the old value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:keys"></a>
+    <strong>pl.OrderedMap:keys ()</strong>
+    </dt>
+    <dd>
+    return the keys in order.
+ (Not a copy!)
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        List
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:values"></a>
+    <strong>pl.OrderedMap:values ()</strong>
+    </dt>
+    <dd>
+    return the values in order.
+ this is relatively expensive.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        List
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:sort"></a>
+    <strong>pl.OrderedMap:sort (cmp)</strong>
+    </dt>
+    <dd>
+    sort the keys.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         a comparison function as for <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.sort">table.sort</a>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the map
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:iter"></a>
+    <strong>pl.OrderedMap:iter ()</strong>
+    </dt>
+    <dd>
+    iterate over key-value pairs in order.
+
+
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Metamethods"></a>Metamethods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.OrderedMap:__pairs"></a>
+    <strong>pl.OrderedMap:__pairs ()</strong>
+    </dt>
+    <dd>
+    iterate over an ordered map (5.2).
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.OrderedMap:__tostring"></a>
+    <strong>pl.OrderedMap:__tostring ()</strong>
+    </dt>
+    <dd>
+    string representation of an ordered map.
+
+
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/classes/pl.Set.html b/Data/Libraries/Penlight/docs/classes/pl.Set.html
new file mode 100644
index 0000000..31cfcee
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/classes/pl.Set.html
@@ -0,0 +1,655 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Methods">Methods</a></li>
+<li><a href="#Metamethods">Metamethods</a></li>
+</ul>
+
+
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><strong>pl.Set</strong></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Class <code>pl.Set</code></h1>
+<p>A Set class.</p>
+<p>
+
+
+
+<pre>
+&gt; Set = <span class="global">require</span> <span class="string">'pl.Set'</span>
+&gt; = Set{<span class="string">'one'</span>,<span class="string">'two'</span>} == Set{<span class="string">'two'</span>,<span class="string">'one'</span>}
+<span class="keyword">true</span>
+&gt; fruit = Set{<span class="string">'apple'</span>,<span class="string">'banana'</span>,<span class="string">'orange'</span>}
+&gt; = fruit[<span class="string">'banana'</span>]
+<span class="keyword">true</span>
+&gt; = fruit[<span class="string">'hazelnut'</span>]
+<span class="keyword">nil</span>
+&gt; colours = Set{<span class="string">'red'</span>,<span class="string">'orange'</span>,<span class="string">'green'</span>,<span class="string">'blue'</span>}
+&gt; = fruit,colours
+[apple,orange,banana]   [blue,green,orange,red]
+&gt; = fruit+colours
+[blue,green,apple,red,orange,banana]
+[orange]
+&gt; more_fruits = fruit + <span class="string">'apricot'</span>
+&gt; = fruit*colours
+ =  more_fruits, fruit
+banana,apricot,apple,orange]    [banana,apple,orange]
+</pre>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../classes/pl.Map.html#">pl.Map</a>, (<a href="../classes/pl.List.html#">pl.List</a> if __tostring is used)</p>
+</p>
+
+
+<h2><a href="#Methods">Methods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:Set">pl.Set:Set (t)</a></td>
+	<td class="summary">create a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:values">pl.Set:values (self)</a></td>
+	<td class="summary">get a list of the values in a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:map">pl.Set:map (self, fn, ...)</a></td>
+	<td class="summary">map a function over the values of a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:union">pl.Set:union (self, set)</a></td>
+	<td class="summary">union of two sets (also +).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:intersection">pl.Set:intersection (self, set)</a></td>
+	<td class="summary">intersection of two sets (also *).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:difference">pl.Set:difference (self, set)</a></td>
+	<td class="summary">new set with elements in the set that are not in the other (also -).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:issubset">pl.Set:issubset (self, set)</a></td>
+	<td class="summary">is the first set a subset of the second (also &lt;)?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:isempty">pl.Set:isempty (self)</a></td>
+	<td class="summary">is the set empty?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:isdisjoint">pl.Set:isdisjoint (s1, s2)</a></td>
+	<td class="summary">are the sets disjoint?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:len">pl.Set:len (s)</a></td>
+	<td class="summary">size of this set (also # for 5.2).</td>
+	</tr>
+</table>
+<h2><a href="#Metamethods">Metamethods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__tostring">pl.Set:__tostring ()</a></td>
+	<td class="summary">string representation of a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__add">pl.Set:__add ()</a></td>
+	<td class="summary">union of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__mul">pl.Set:__mul ()</a></td>
+	<td class="summary">intersection of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__sub">pl.Set:__sub ()</a></td>
+	<td class="summary">difference of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__pow">pl.Set:__pow ()</a></td>
+	<td class="summary">symmetric difference of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__lt">pl.Set:__lt ()</a></td>
+	<td class="summary">first set subset of second?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__len">pl.Set:__len ()</a></td>
+	<td class="summary">cardinality of set (5.2).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pl.Set:__eq">pl.Set:__eq (s1, s2)</a></td>
+	<td class="summary">equality between sets.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Methods"></a>Methods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Set:Set"></a>
+    <strong>pl.Set:Set (t)</strong>
+    </dt>
+    <dd>
+    create a set.  <br>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         may be a Set, Map or list-like table.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:values"></a>
+    <strong>pl.Set:values (self)</strong>
+    </dt>
+    <dd>
+    get a list of the values in a set.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:map"></a>
+    <strong>pl.Set:map (self, fn, ...)</strong>
+    </dt>
+    <dd>
+    map a function over the values of a set.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">fn</span>
+         a function
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments to pass to the function.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:union"></a>
+    <strong>pl.Set:union (self, set)</strong>
+    </dt>
+    <dd>
+    union of two sets (also +).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:intersection"></a>
+    <strong>pl.Set:intersection (self, set)</strong>
+    </dt>
+    <dd>
+    intersection of two sets (also *).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">&gt; s = Set{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+&gt; t = Set{<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = t
+[<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>]
+&gt; = Set.intersection(s,t)
+[<span class="number">30</span>,<span class="number">20</span>]
+&gt; = s*t
+[<span class="number">30</span>,<span class="number">20</span>]</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "pl.Set:difference"></a>
+    <strong>pl.Set:difference (self, set)</strong>
+    </dt>
+    <dd>
+    new set with elements in the set that are not in the other (also -).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:issubset"></a>
+    <strong>pl.Set:issubset (self, set)</strong>
+    </dt>
+    <dd>
+    is the first set a subset of the second (also &lt;)?.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:isempty"></a>
+    <strong>pl.Set:isempty (self)</strong>
+    </dt>
+    <dd>
+    is the set empty?.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:isdisjoint"></a>
+    <strong>pl.Set:isdisjoint (s1, s2)</strong>
+    </dt>
+    <dd>
+    are the sets disjoint?  (no elements in common).
+ Uses naive definition, i.e. that intersection is empty
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+         a Set
+        </li>
+        <li><span class="parameter">s2</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:len"></a>
+    <strong>pl.Set:len (s)</strong>
+    </dt>
+    <dd>
+    size of this set (also # for 5.2).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        size
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Metamethods"></a>Metamethods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pl.Set:__tostring"></a>
+    <strong>pl.Set:__tostring ()</strong>
+    </dt>
+    <dd>
+    string representation of a set.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__add"></a>
+    <strong>pl.Set:__add ()</strong>
+    </dt>
+    <dd>
+    union of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__mul"></a>
+    <strong>pl.Set:__mul ()</strong>
+    </dt>
+    <dd>
+    intersection of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__sub"></a>
+    <strong>pl.Set:__sub ()</strong>
+    </dt>
+    <dd>
+    difference of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__pow"></a>
+    <strong>pl.Set:__pow ()</strong>
+    </dt>
+    <dd>
+    symmetric difference of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__lt"></a>
+    <strong>pl.Set:__lt ()</strong>
+    </dt>
+    <dd>
+    first set subset of second?
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__len"></a>
+    <strong>pl.Set:__len ()</strong>
+    </dt>
+    <dd>
+    cardinality of set (5.2).
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pl.Set:__eq"></a>
+    <strong>pl.Set:__eq (s1, s2)</strong>
+    </dt>
+    <dd>
+    equality between sets.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+
+
+
+        </li>
+        <li><span class="parameter">s2</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/seesubst.lua.html b/Data/Libraries/Penlight/docs/examples/seesubst.lua.html
new file mode 100644
index 0000000..e850122
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/seesubst.lua.html
@@ -0,0 +1,174 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><strong>seesubst.lua</strong></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>seesubst.lua</h2>
+<pre>
+<span class="comment">-- shows how replacing '@see module' in the Markdown documentation
+</span><span class="comment">-- can be done more elegantly using PL.
+</span><span class="comment">-- We either have something like 'pl.config' (a module reference)
+</span><span class="comment">-- or 'pl.seq.map' (a function reference); these cases must be distinguished
+</span><span class="comment">-- and a Markdown link generated pointing to the LuaDoc file.
+</span>
+<span class="keyword">local</span> sip = <span class="global">require</span> <span class="string">'pl.sip'</span>
+<span class="keyword">local</span> stringx = <span class="global">require</span> <span class="string">'pl.stringx'</span>
+
+<span class="keyword">local</span> res = {}
+<span class="keyword">local</span> s = <span class="string">[[
+(@see pl.bonzo.dog)
+remember about @see pl.bonzo
+
+]]</span>
+
+<span class="keyword">local</span> _gsub_patterns = {}
+
+<span class="keyword">local</span> <span class="keyword">function</span> gsub (s,pat,subst,start)
+    <span class="keyword">local</span> fpat = _gsub_patterns[pat]
+    <span class="keyword">if</span> <span class="keyword">not</span> fpat <span class="keyword">then</span>
+        <span class="comment">-- use SIP to generate a proper string pattern.
+</span>        <span class="comment">-- the _whole thing_ is a capture, to get the whole match
+</span>        <span class="comment">-- and the unnamed capture.
+</span>        fpat = <span class="string">'('</span>..sip.create_pattern(pat)..<span class="string">')'</span>
+        _gsub_patterns[pat] = fpat
+    <span class="keyword">end</span>
+    <span class="keyword">return</span> s:gsub(fpat,subst,start)
+<span class="keyword">end</span>
+
+
+<span class="keyword">local</span> mod = sip.compile <span class="string">'$v.$v'</span>
+<span class="keyword">local</span> fun = sip.compile <span class="string">'$v.$v.$v'</span>
+
+<span class="keyword">for</span> line <span class="keyword">in</span> stringx.lines(s) <span class="keyword">do</span>
+    line = gsub(line,<span class="string">'@see $p'</span>,<span class="keyword">function</span>(see,path)
+        <span class="keyword">if</span> fun(path,res) <span class="keyword">or</span> mod(path,res) <span class="keyword">then</span>
+            <span class="keyword">local</span> ret = (<span class="string">'[see %s](%s.%s.html'</span>):format(path,res[<span class="number">1</span>],res[<span class="number">2</span>])
+            <span class="keyword">if</span> res[<span class="number">3</span>] <span class="keyword">then</span>
+                <span class="keyword">return</span> ret..<span class="string">'#'</span>..res[<span class="number">3</span>]..<span class="string">')'</span>
+            <span class="keyword">else</span>
+                <span class="keyword">return</span> ret..<span class="string">')'</span>
+            <span class="keyword">end</span>
+        <span class="keyword">end</span>
+    <span class="keyword">end</span>)
+    <span class="global">print</span>(line)
+<span class="keyword">end</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/sipscan.lua.html b/Data/Libraries/Penlight/docs/examples/sipscan.lua.html
new file mode 100644
index 0000000..8848423
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/sipscan.lua.html
@@ -0,0 +1,161 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><strong>sipscan.lua</strong></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>sipscan.lua</h2>
+<pre>
+<span class="comment">-- another SIP example, shows how an awkward log file format
+</span><span class="comment">-- can be parsed. It also prints out the actual Lua string
+</span><span class="comment">-- pattern generated:
+</span><span class="comment">-- SYNC%s*%[([+%-%d]%d*)%]%s*([+%-%d]%d*)%s*([+%-%d]%d*)
+</span>
+<span class="keyword">local</span> sip = <span class="global">require</span> <span class="string">'pl.sip'</span>
+<span class="keyword">local</span> stringx = <span class="global">require</span> <span class="string">'pl.stringx'</span>
+
+<span class="keyword">local</span> s = <span class="string">[[
+SYNC [1] 0 547 (14679 sec)
+SYNC [2] 0 555 (14679 sec)
+SYNC [3] 0 563 (14679 sec)
+SYNC [4] 0 571 (14679 sec)
+SYNC [5] -1 580 (14679 sec)
+SYNC [6] 0 587 (14679 sec)
+]]</span>
+
+
+<span class="keyword">local</span> first = <span class="keyword">true</span>
+<span class="keyword">local</span> expected
+<span class="keyword">local</span> res = {}
+<span class="keyword">local</span> pat = <span class="string">'SYNC [$i{seq}] $i{diff} $i{val}'</span>
+<span class="global">print</span>(sip.create_pattern(pat))
+<span class="keyword">local</span> match = sip.compile(pat)
+<span class="keyword">for</span> line <span class="keyword">in</span> stringx.lines(s) <span class="keyword">do</span>
+  <span class="keyword">if</span> match(line,res) <span class="keyword">then</span>
+    <span class="keyword">if</span> first <span class="keyword">then</span>
+      expected = res.val
+      first = <span class="keyword">false</span>
+    <span class="keyword">end</span>
+    <span class="global">print</span>(res.val,expected - res.val)
+    expected = expected + <span class="number">8</span>
+  <span class="keyword">end</span>
+<span class="keyword">end</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/symbols.lua.html b/Data/Libraries/Penlight/docs/examples/symbols.lua.html
new file mode 100644
index 0000000..0dafb21
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/symbols.lua.html
@@ -0,0 +1,347 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><strong>symbols.lua</strong></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>symbols.lua</h2>
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+utils.import <span class="string">'pl.func'</span>
+<span class="keyword">local</span> ops = <span class="global">require</span> <span class="string">'pl.operator'</span>
+<span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> append,concat = <span class="global">table</span>.insert,<span class="global">table</span>.concat
+<span class="keyword">local</span> compare,find_if,compare_no_order,imap,reduce,count_map = tablex.compare,tablex.find_if,tablex.compare_no_order,tablex.imap,tablex.reduce,tablex.count_map
+<span class="keyword">local</span> <span class="global">unpack</span> = <span class="global">table</span>.<span class="global">unpack</span>
+
+<span class="keyword">function</span> bindval (self,val)
+    <span class="global">rawset</span>(self,<span class="string">'value'</span>,val)
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> optable = ops.optable
+
+<span class="keyword">function</span> sexpr (e)
+	<span class="keyword">if</span> isPE(e) <span class="keyword">then</span>
+		<span class="keyword">if</span> e.op ~= <span class="string">'X'</span> <span class="keyword">then</span>
+			<span class="keyword">local</span> args = tablex.imap(sexpr,e)
+			<span class="keyword">return</span> <span class="string">'('</span>..e.op..<span class="string">' '</span>..<span class="global">table</span>.concat(args,<span class="string">' '</span>)..<span class="string">')'</span>
+		<span class="keyword">else</span>
+			<span class="keyword">return</span> e.repr
+		<span class="keyword">end</span>
+	<span class="keyword">else</span>
+		<span class="keyword">return</span> <span class="global">tostring</span>(e)
+	<span class="keyword">end</span>
+<span class="keyword">end</span>
+
+
+psexpr = compose(<span class="global">print</span>,sexpr)
+
+
+
+<span class="keyword">function</span> equals (e1,e2)
+    <span class="keyword">local</span> p1,p2 = isPE(e1),isPE(e2)
+    <span class="keyword">if</span> p1 ~= p2 <span class="keyword">then</span> <span class="keyword">return</span> <span class="keyword">false</span> <span class="keyword">end</span>  <span class="comment">-- different kinds of animals!
+</span>    <span class="keyword">if</span> p1 <span class="keyword">and</span> p2 <span class="keyword">then</span> <span class="comment">-- both PEs
+</span>        <span class="comment">-- operators must be the same
+</span>        <span class="keyword">if</span> e1.op ~= e2.op <span class="keyword">then</span> <span class="keyword">return</span> <span class="keyword">false</span> <span class="keyword">end</span>
+        <span class="comment">-- PHs are equal if their representations are equal
+</span>        <span class="keyword">if</span> e1.op == <span class="string">'X'</span> <span class="keyword">then</span> <span class="keyword">return</span> e1.repr == e2.repr
+        <span class="comment">-- commutative operators
+</span>        <span class="keyword">elseif</span> e1.op == <span class="string">'+'</span> <span class="keyword">or</span> e1.op == <span class="string">'*'</span> <span class="keyword">then</span>
+            <span class="keyword">return</span> compare_no_order(e1,e2,equals)
+        <span class="keyword">else</span>
+            <span class="comment">-- arguments must be the same
+</span>            <span class="keyword">return</span> compare(e1,e2,equals)
+        <span class="keyword">end</span>
+    <span class="keyword">else</span> <span class="comment">-- fall back on simple equality for non PEs
+</span>        <span class="keyword">return</span> e1 == e2
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="comment">-- run down an unbalanced operator chain (like a+b+c) and return the arguments {a,b,c}
+</span><span class="keyword">function</span> tcollect (op,e,ls)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">and</span> e.op == op <span class="keyword">then</span>
+        <span class="keyword">for</span> i = <span class="number">1</span>,#e <span class="keyword">do</span>
+            tcollect(op,e[i],ls)
+        <span class="keyword">end</span>
+    <span class="keyword">else</span>
+        ls:append(e)
+        <span class="keyword">return</span>
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> rcollect (e)
+    <span class="keyword">local</span> res = List()
+    tcollect(e.op,e,res)
+    <span class="keyword">return</span> res
+<span class="keyword">end</span>
+
+
+<span class="comment">-- balance ensures that +/* chains are collected together, operates in-place.
+</span><span class="comment">-- thus (+(+ a b) c) or (+ a (+ b c)) becomes (+ a b c), order immaterial
+</span><span class="keyword">function</span> balance (e)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">and</span> e.op ~= <span class="string">'X'</span> <span class="keyword">then</span>
+        <span class="keyword">local</span> op,args = e.op
+        <span class="keyword">if</span> op == <span class="string">'+'</span> <span class="keyword">or</span> op == <span class="string">'*'</span> <span class="keyword">then</span>
+            args = rcollect(e)
+        <span class="keyword">else</span>
+            args = imap(balance,e)
+        <span class="keyword">end</span>
+        <span class="keyword">for</span> i = <span class="number">1</span>,#args <span class="keyword">do</span>
+            e[i] = args[i]
+        <span class="keyword">end</span>
+    <span class="keyword">end</span>
+    <span class="keyword">return</span> e
+<span class="keyword">end</span>
+
+<span class="comment">-- fold constants in an expression
+</span><span class="keyword">function</span> fold (e)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">then</span>
+        <span class="keyword">if</span> e.op == <span class="string">'X'</span> <span class="keyword">then</span>
+            <span class="comment">-- there could be _bound values_!
+</span>            <span class="keyword">local</span> val = <span class="global">rawget</span>(e,<span class="string">'value'</span>)
+            <span class="keyword">return</span> val <span class="keyword">and</span> val <span class="keyword">or</span> e
+        <span class="keyword">else</span>
+            <span class="keyword">local</span> op = e.op
+            <span class="keyword">local</span> addmul = op == <span class="string">'*'</span> <span class="keyword">or</span> op == <span class="string">'+'</span>
+            <span class="comment">-- first fold all arguments
+</span>            <span class="keyword">local</span> args = imap(fold,e)
+            <span class="keyword">if</span> <span class="keyword">not</span> addmul <span class="keyword">and</span> <span class="keyword">not</span> find_if(args,isPE) <span class="keyword">then</span>
+                <span class="comment">-- no placeholders in these args, we can fold the expression.
+</span>                <span class="keyword">local</span> opfn = optable[op]
+                <span class="keyword">if</span> opfn <span class="keyword">then</span>
+                    <span class="keyword">return</span> opfn(<span class="global">unpack</span>(args))
+                <span class="keyword">else</span>
+                    <span class="keyword">return</span> <span class="string">'?'</span>
+                <span class="keyword">end</span>
+            <span class="keyword">elseif</span> addmul <span class="keyword">then</span>
+                <span class="comment">-- enforce a few rules for + and *
+</span>                <span class="comment">-- split the args into two classes, PE args and non-PE args.
+</span>                <span class="keyword">local</span> classes = List.partition(args,isPE)
+                <span class="keyword">local</span> pe,npe = classes[<span class="keyword">true</span>],classes[<span class="keyword">false</span>]
+                <span class="keyword">if</span> npe <span class="keyword">then</span> <span class="comment">-- there's at least one non PE argument
+</span>                    <span class="comment">-- so fold them
+</span>                    <span class="keyword">if</span> #npe == <span class="number">1</span> <span class="keyword">then</span> npe = npe[<span class="number">1</span>]
+                    <span class="keyword">else</span> npe = npe:reduce(optable[op])
+                    <span class="keyword">end</span>
+                    <span class="comment">-- if the result is a constant, return it
+</span>                    <span class="keyword">if</span> <span class="keyword">not</span> pe <span class="keyword">then</span> <span class="keyword">return</span> npe <span class="keyword">end</span>
+
+                    <span class="comment">-- either (* 1 x) =&gt; x or (* 1 x y ...) =&gt; (* x y ...)
+</span>                    <span class="keyword">if</span> op == <span class="string">'*'</span> <span class="keyword">then</span>
+                        <span class="keyword">if</span> npe == <span class="number">0</span> <span class="keyword">then</span> <span class="keyword">return</span> <span class="number">0</span>
+                        <span class="keyword">elseif</span> npe == <span class="number">1</span> <span class="keyword">then</span> <span class="comment">-- identity
+</span>                            <span class="keyword">if</span> #pe == <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> pe[<span class="number">1</span>] <span class="keyword">else</span> npe = <span class="keyword">nil</span> <span class="keyword">end</span>
+                        <span class="keyword">end</span>
+                    <span class="keyword">else</span> <span class="comment">-- special cases for +
+</span>                        <span class="keyword">if</span> npe == <span class="number">0</span> <span class="keyword">then</span> <span class="comment">-- identity
+</span>                            <span class="keyword">if</span> #pe == <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> pe[<span class="number">1</span>] <span class="keyword">else</span> npe = <span class="keyword">nil</span> <span class="keyword">end</span>
+                        <span class="keyword">end</span>
+                    <span class="keyword">end</span>
+                <span class="keyword">end</span>
+                <span class="comment">-- build up the final arguments
+</span>                <span class="keyword">local</span> res = {}
+                <span class="keyword">if</span> npe <span class="keyword">then</span> append(res,npe) <span class="keyword">end</span>
+                <span class="keyword">for</span> val,count <span class="keyword">in</span> <span class="global">pairs</span>(count_map(pe,equals)) <span class="keyword">do</span>
+                    <span class="keyword">if</span> count &gt; <span class="number">1</span> <span class="keyword">then</span>
+                        <span class="keyword">if</span> op == <span class="string">'*'</span> <span class="keyword">then</span> val = val ^ count
+                        <span class="keyword">else</span> val = val * count
+                        <span class="keyword">end</span>
+                    <span class="keyword">end</span>
+                    append(res,val)
+                <span class="keyword">end</span>
+                <span class="keyword">if</span> #res == <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> res[<span class="number">1</span>] <span class="keyword">end</span>
+                <span class="keyword">return</span> PE{op=op,<span class="global">unpack</span>(res)}
+            <span class="keyword">elseif</span> op == <span class="string">'^'</span> <span class="keyword">then</span>
+                <span class="keyword">if</span> args[<span class="number">2</span>] == <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> args[<span class="number">1</span>] <span class="keyword">end</span> <span class="comment">-- identity
+</span>                <span class="keyword">if</span> args[<span class="number">2</span>] == <span class="number">0</span> <span class="keyword">then</span> <span class="keyword">return</span> <span class="number">1</span> <span class="keyword">end</span>
+            <span class="keyword">end</span>
+            <span class="keyword">return</span> PE{op=op,<span class="global">unpack</span>(args)}
+        <span class="keyword">end</span>
+    <span class="keyword">else</span>
+        <span class="keyword">return</span> e
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> expand (e)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">and</span> e.op == <span class="string">'*'</span> <span class="keyword">and</span> isPE(e[<span class="number">2</span>]) <span class="keyword">and</span> e[<span class="number">2</span>].op == <span class="string">'+'</span> <span class="keyword">then</span>
+        <span class="keyword">local</span> a,b = e[<span class="number">1</span>],e[<span class="number">2</span>]
+        <span class="keyword">return</span> expand(b[<span class="number">1</span>]*a) + expand(b[<span class="number">2</span>]*a)
+    <span class="keyword">else</span>
+        <span class="keyword">return</span> e
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> isnumber (x)
+    <span class="keyword">return</span> <span class="global">type</span>(x) == <span class="string">'number'</span>
+<span class="keyword">end</span>
+
+<span class="comment">-- does this PE contain a reference to x?
+</span><span class="keyword">function</span> references (e,x)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">then</span>
+        <span class="keyword">if</span> e.op == <span class="string">'X'</span> <span class="keyword">then</span> <span class="keyword">return</span> x.repr == e.repr
+        <span class="keyword">else</span>
+            <span class="keyword">return</span> find_if(e,references,x)
+        <span class="keyword">end</span>
+    <span class="keyword">else</span>
+        <span class="keyword">return</span> <span class="keyword">false</span>
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> <span class="keyword">function</span> muli (args)
+    <span class="keyword">return</span> PE{op=<span class="string">'*'</span>,<span class="global">unpack</span>(args)}
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> <span class="keyword">function</span> addi (args)
+    <span class="keyword">return</span> PE{op=<span class="string">'+'</span>,<span class="global">unpack</span>(args)}
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> diff (e,x)
+    <span class="keyword">if</span> isPE(e) <span class="keyword">and</span> references(e,x) <span class="keyword">then</span>
+        <span class="keyword">local</span> op = e.op
+        <span class="keyword">if</span> op == <span class="string">'X'</span> <span class="keyword">then</span>
+            <span class="keyword">return</span> <span class="number">1</span>
+        <span class="keyword">else</span>
+            <span class="keyword">local</span> a,b = e[<span class="number">1</span>],e[<span class="number">2</span>]
+            <span class="keyword">if</span> op == <span class="string">'+'</span> <span class="keyword">then</span> <span class="comment">-- differentiation is linear
+</span>                <span class="keyword">local</span> args = imap(diff,e,x)
+                <span class="keyword">return</span> balance(addi(args))
+            <span class="keyword">elseif</span> op == <span class="string">'*'</span> <span class="keyword">then</span> <span class="comment">-- product rule
+</span>                <span class="keyword">local</span> res,d,ee = {}
+                <span class="keyword">for</span> i = <span class="number">1</span>,#e <span class="keyword">do</span>
+                    d = fold(diff(e[i],x))
+                    <span class="keyword">if</span> d ~= <span class="number">0</span> <span class="keyword">then</span>
+                        ee = {<span class="global">unpack</span>(e)}
+                        ee[i] = d
+                        append(res,balance(muli(ee)))
+                    <span class="keyword">end</span>
+                <span class="keyword">end</span>
+                <span class="keyword">if</span> #res &gt; <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> addi(res)
+                <span class="keyword">else</span> <span class="keyword">return</span> res[<span class="number">1</span>] <span class="keyword">end</span>
+            <span class="keyword">elseif</span> op == <span class="string">'^'</span> <span class="keyword">and</span> isnumber(b) <span class="keyword">then</span> <span class="comment">-- power rule
+</span>                <span class="keyword">return</span> b*x^(b-<span class="number">1</span>)
+            <span class="keyword">end</span>
+        <span class="keyword">end</span>
+    <span class="keyword">else</span>
+        <span class="keyword">return</span> <span class="number">0</span>
+    <span class="keyword">end</span>
+<span class="keyword">end</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/test-cmp.lua.html b/Data/Libraries/Penlight/docs/examples/test-cmp.lua.html
new file mode 100644
index 0000000..ac6e44a
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/test-cmp.lua.html
@@ -0,0 +1,130 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><strong>test-cmp.lua</strong></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>test-cmp.lua</h2>
+<pre>
+<span class="keyword">local</span> A = <span class="global">require</span> <span class="string">'pl.tablex'</span>
+<span class="global">print</span>(A.compare_no_order({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">2</span>,<span class="number">1</span>,<span class="number">3</span>}))
+<span class="global">print</span>(A.compare_no_order({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">2</span>,<span class="number">1</span>,<span class="number">3</span>},<span class="string">'=='</span>))</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/test-data.lua.html b/Data/Libraries/Penlight/docs/examples/test-data.lua.html
new file mode 100644
index 0000000..8128411
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/test-data.lua.html
@@ -0,0 +1,372 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><strong>test-data.lua</strong></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>test-data.lua</h2>
+<pre>
+<span class="keyword">local</span> data = <span class="global">require</span> <span class="string">'pl.data'</span>
+<span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> array = <span class="global">require</span> <span class="string">'pl.array2d'</span>
+<span class="keyword">local</span> func = <span class="global">require</span> <span class="string">'pl.func'</span>
+<span class="keyword">local</span> seq = <span class="global">require</span> <span class="string">'pl.seq'</span>
+<span class="keyword">local</span> stringio = <span class="global">require</span> <span class="string">'pl.stringio'</span>
+<span class="keyword">local</span> open = stringio. open
+<span class="keyword">local</span> asserteq = <span class="global">require</span> <span class="string">'pl.test'</span> . asserteq
+<span class="keyword">local</span> T = <span class="global">require</span> <span class="string">'pl.test'</span>. tuple
+
+<span class="comment">--[=[
+dat,err = data.read(open [[
+1.0 0.1
+0.2 1.3
+]])
+
+if err then print(err) end
+
+require 'pl.pretty'.dump(dat)
+os.exit(0)
+--]=]</span>
+
+<span class="comment">-- tab-separated data, explicit column names
+</span><span class="keyword">local</span> t1f = open <span class="string">[[
+EventID	Magnitude	LocationX	LocationY	LocationZ	LocationError	EventDate	DataFile
+981124001	2.0	18988.4	10047.1	4149.7	33.8	24/11/1998 11:18:05	981124DF.AAB
+981125001	0.8	19104.0	9970.4	5088.7	3.0	25/11/1998 05:44:54	981125DF.AAB
+981127003	0.5	19012.5	9946.9	3831.2	46.0	27/11/1998 17:15:17	981127DF.AAD
+981127005	0.6	18676.4	10606.2	3761.9	4.4	27/11/1998 17:46:36	981127DF.AAF
+981127006	0.2	19109.9	9716.5	3612.0	11.8	27/11/1998 19:29:51	981127DF.AAG
+]]</span>
+
+<span class="keyword">local</span> t1 = data.read (t1f)
+<span class="comment">-- column_by_name returns a List
+</span>asserteq(t1:column_by_name <span class="string">'Magnitude'</span>,List{<span class="number">2</span>,<span class="number">0.8</span>,<span class="number">0.5</span>,<span class="number">0.6</span>,<span class="number">0.2</span>})
+<span class="comment">-- can use array.column as well
+</span>asserteq(array.column(t1,<span class="number">2</span>),{<span class="number">2</span>,<span class="number">0.8</span>,<span class="number">0.5</span>,<span class="number">0.6</span>,<span class="number">0.2</span>})
+
+<span class="comment">-- only numerical columns (deduced from first data row) are converted by default
+</span><span class="comment">-- can look up indices in the list fieldnames.
+</span><span class="keyword">local</span> EDI = t1.fieldnames:index <span class="string">'EventDate'</span>
+<span class="global">assert</span>(<span class="global">type</span>(t1[<span class="number">1</span>][EDI]) == <span class="string">'string'</span>)
+
+<span class="comment">-- select method returns a sequence, in this case single-valued.
+</span><span class="comment">-- (Note that seq.copy returns a List)
+</span>asserteq(seq(t1:<span class="global">select</span> <span class="string">'LocationX where Magnitude &gt; 0.5'</span>):copy(),List{<span class="number">18988.4</span>,<span class="number">19104</span>,<span class="number">18676.4</span>})
+
+<span class="comment">--[[
+--a common select usage pattern:
+for event,mag in t1:select 'EventID,Magnitude sort by Magnitude desc' do
+    print(event,mag)
+end
+--]]</span>
+
+<span class="comment">-- space-separated, but with last field containing spaces.
+</span><span class="keyword">local</span> t2f = open <span class="string">[[
+USER PID %MEM %CPU COMMAND
+sdonovan 2333  0.3 0.1 background --n=2
+root 2332  0.4  0.2 fred --start=yes
+root 2338  0.2  0.1 backyard-process
+]]</span>
+
+<span class="keyword">local</span> t2,err = data.read(t2f,{last_field_collect=<span class="keyword">true</span>})
+<span class="keyword">if</span> <span class="keyword">not</span> t2 <span class="keyword">then</span> <span class="keyword">return</span> <span class="global">print</span> (err) <span class="keyword">end</span>
+
+<span class="comment">-- the last_field_collect option is useful with space-delimited data where the last
+</span><span class="comment">-- field may contain spaces. Otherwise, a record count mismatch should be an error!
+</span><span class="keyword">local</span> lt2 = List(t2[<span class="number">2</span>])
+asserteq(lt2:join <span class="string">','</span>,<span class="string">'root,2332,0.4,0.2,fred --start=yes'</span>)
+
+<span class="comment">-- fieldnames are converted into valid identifiers by substituting _
+</span><span class="comment">-- (we do this to make select queries parseable by Lua)
+</span>asserteq(t2.fieldnames,List{<span class="string">'USER'</span>,<span class="string">'PID'</span>,<span class="string">'_MEM'</span>,<span class="string">'_CPU'</span>,<span class="string">'COMMAND'</span>})
+
+<span class="comment">-- select queries are NOT SQL so remember to use == ! (and no 'between' operator, sorry)
+</span><span class="comment">--s,err = t2:select('_MEM where USER="root"')
+</span><span class="comment">--assert(err == [[[string "tmp"]:9: unexpected symbol near '=']])
+</span>
+<span class="keyword">local</span> s = t2:<span class="global">select</span>(<span class="string">'_MEM where USER=="root"'</span>)
+<span class="global">assert</span>(s() == <span class="number">0.4</span>)
+<span class="global">assert</span>(s() == <span class="number">0.2</span>)
+<span class="global">assert</span>(s() == <span class="keyword">nil</span>)
+
+<span class="comment">-- CSV, Excel style. Double-quoted fields are allowed, and they may contain commas!
+</span><span class="keyword">local</span> t3f = open <span class="string">[[
+"Department Name","Employee ID",Project,"Hours Booked"
+sales,1231,overhead,4
+sales,1255,overhead,3
+engineering,1501,development,5
+engineering,1501,maintenance,3
+engineering,1433,maintenance,10
+]]</span>
+
+<span class="keyword">local</span> t3 = data.read(t3f,{csv=<span class="keyword">true</span>})
+
+<span class="comment">-- although fieldnames are turned in valid Lua identifiers, there is always <code>original_fieldnames</code>
+</span>asserteq(t3.fieldnames,List{<span class="string">'Department_Name'</span>,<span class="string">'Employee_ID'</span>,<span class="string">'Project'</span>,<span class="string">'Hours_Booked'</span>})
+asserteq(t3.original_fieldnames,List{<span class="string">'Department Name'</span>,<span class="string">'Employee ID'</span>,<span class="string">'Project'</span>,<span class="string">'Hours Booked'</span>})
+
+<span class="comment">-- a common operation is to select using a given list of columns, and each row
+</span><span class="comment">-- on some explicit condition. The select() method can take a table with these
+</span><span class="comment">-- parameters
+</span><span class="keyword">local</span> keepcols = {<span class="string">'Employee_ID'</span>,<span class="string">'Hours_Booked'</span>}
+
+<span class="keyword">local</span> q = t3:<span class="global">select</span> { fields = keepcols,
+    where = <span class="keyword">function</span>(row) <span class="keyword">return</span> row[<span class="number">1</span>]==<span class="string">'engineering'</span> <span class="keyword">end</span>
+    }
+
+asserteq(seq.copy2(q),{{<span class="number">1501</span>,<span class="number">5</span>},{<span class="number">1501</span>,<span class="number">3</span>},{<span class="number">1433</span>,<span class="number">10</span>}})
+
+<span class="comment">-- another pattern is doing a select to restrict rows &amp; columns, process some
+</span><span class="comment">-- fields and write out the modified rows.
+</span>
+<span class="keyword">local</span> outf = stringio.create()
+
+<span class="keyword">local</span> names = {[<span class="number">1501</span>]=<span class="string">'don'</span>,[<span class="number">1433</span>]=<span class="string">'dilbert'</span>}
+
+t3:write_row (outf,{<span class="string">'Employee'</span>,<span class="string">'Hours_Booked'</span>})
+q = t3:select_row {fields=keepcols,where=func.Eq(func._1[<span class="number">1</span>],<span class="string">'engineering'</span>)}
+<span class="keyword">for</span> row <span class="keyword">in</span> q <span class="keyword">do</span>
+    row[<span class="number">1</span>] = names[row[<span class="number">1</span>]]
+    t3:write_row(outf,row)
+<span class="keyword">end</span>
+
+asserteq(outf:value(),
+<span class="string">[[
+Employee,Hours_Booked
+don,5
+don,3
+dilbert,10
+]]</span>)
+
+<span class="comment">-- data may not always have column headers. When creating a data object
+</span><span class="comment">-- from a two-dimensional array, may specify the fieldnames, as a list or a string.
+</span><span class="comment">-- The delimiter is deduced from the fieldname string, so a string just containing
+</span><span class="comment">-- the delimiter will set it,  and the fieldnames will be empty.
+</span><span class="keyword">local</span> dat = List()
+<span class="keyword">local</span> row = List.range(<span class="number">1</span>,<span class="number">10</span>)
+<span class="keyword">for</span> i = <span class="number">1</span>,<span class="number">10</span> <span class="keyword">do</span>
+    dat:append(row:map(<span class="string">'*'</span>,i))
+<span class="keyword">end</span>
+dat = data.new(dat,<span class="string">','</span>)
+<span class="keyword">local</span> out = stringio.create()
+dat:write(out,<span class="string">','</span>)
+asserteq(out:value(), <span class="string">[[
+1,2,3,4,5,6,7,8,9,10
+2,4,6,8,10,12,14,16,18,20
+3,6,9,12,15,18,21,24,27,30
+4,8,12,16,20,24,28,32,36,40
+5,10,15,20,25,30,35,40,45,50
+6,12,18,24,30,36,42,48,54,60
+7,14,21,28,35,42,49,56,63,70
+8,16,24,32,40,48,56,64,72,80
+9,18,27,36,45,54,63,72,81,90
+10,20,30,40,50,60,70,80,90,100
+]]</span>)
+
+<span class="comment">-- you can always use numerical field indices, AWK-style;
+</span><span class="comment">-- note how the copy_select method gives you a data object instead of an
+</span><span class="comment">-- iterator over the fields
+</span><span class="keyword">local</span> res = dat:copy_select <span class="string">'$1,$3 where $1 &gt; 5'</span>
+<span class="keyword">local</span> L = List
+asserteq(L(res),L{
+    L{<span class="number">6</span>, <span class="number">18</span>},
+    L{<span class="number">7</span>,<span class="number">21</span>},
+    L{<span class="number">8</span>,<span class="number">24</span>},
+    L{<span class="number">9</span>,<span class="number">27</span>},
+    L{<span class="number">10</span>,<span class="number">30</span>},
+})
+
+<span class="comment">-- the column_by_name method may take a fieldname or an index
+</span>asserteq(dat:column_by_name(<span class="number">2</span>), L{<span class="number">2</span>,<span class="number">4</span>,<span class="number">6</span>,<span class="number">8</span>,<span class="number">10</span>,<span class="number">12</span>,<span class="number">14</span>,<span class="number">16</span>,<span class="number">18</span>,<span class="number">20</span>})
+
+<span class="comment">-- the field list may contain expressions or even constants
+</span><span class="keyword">local</span> q = dat:<span class="global">select</span> <span class="string">'$3,2*$4 where $1 == 8'</span>
+asserteq(T(q()),T(<span class="number">24</span>,<span class="number">64</span>))
+
+dat,err = data.read(open <span class="string">[[
+1.0 0.1
+0.2 1.3
+]]</span>)
+
+<span class="keyword">if</span> err <span class="keyword">then</span> <span class="global">print</span>(err) <span class="keyword">end</span>
+
+<span class="comment">-- if a method cannot be found, then we look up in array2d
+</span><span class="comment">-- array2d.flatten(t) makes a 1D list out of a 2D array,
+</span><span class="comment">-- and then List.minmax() gets the extrema.
+</span>
+asserteq(T(dat:flatten():minmax()),T(<span class="number">0.1</span>,<span class="number">1.3</span>))
+
+<span class="keyword">local</span> f = open <span class="string">[[
+Time Message
+1266840760 +# EE7C0600006F0D00C00F06010302054000000308010A00002B00407B00
+1266840760 closure data 0.000000 1972 1972 0
+1266840760 ++ 1266840760 EE 1
+1266840760 +# EE7C0600006F0D00C00F06010302054000000408020A00002B00407B00
+1266840764 closure data 0.000000 1972 1972 0
+1266840764 ++ 1266840764 EE 1
+1266840764 +# EE7C0600006F0D00C00F06010302054000000508030A00002B00407B00
+1266840768 duplicate?
+1266840768 +# EE7C0600006F0D00C00F06010302054000000508030A00002B00407B00
+1266840768 closure data 0.000000 1972 1972 0
+]]</span>
+
+<span class="comment">-- the <code>convert</code> option provides custom converters for each specified column.
+</span><span class="comment">-- Here we convert the timestamps into Date objects and collect everything
+</span><span class="comment">-- else into one field
+</span><span class="keyword">local</span> Date = <span class="global">require</span> <span class="string">'pl.Date'</span>
+
+<span class="keyword">local</span> <span class="keyword">function</span> date_convert (ds)
+    <span class="keyword">return</span> Date(<span class="global">tonumber</span>(ds))
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> d = data.read(f,{convert={[<span class="number">1</span>]=date_convert},last_field_collect=<span class="keyword">true</span>})
+
+asserteq(#d[<span class="number">1</span>],<span class="number">2</span>)
+asserteq(d[<span class="number">2</span>][<span class="number">1</span>]:year(),<span class="number">2010</span>)
+
+d = {{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}}
+out = stringio.create()
+data.write(d,out,{<span class="string">'A'</span>,<span class="string">'B'</span>,<span class="string">'C'</span>},<span class="string">','</span>)
+asserteq(out:value(),
+<span class="string">[[
+A,B,C
+1,2,3
+10,20,30
+]]</span>)
+
+out = stringio.create()
+d.fieldnames = {<span class="string">'A'</span>,<span class="string">'B'</span>,<span class="string">'C'</span>}
+data.write(d,out)
+
+asserteq(out:value(),
+<span class="string">[[
+A	B	C
+1	2	3
+10	20	30
+]]</span>)
+
+
+d = data.read(stringio.open <span class="string">'One,Two\n1,\n,20\n'</span>,{csv=<span class="keyword">true</span>})
+asserteq(d,{
+    {<span class="number">1</span>,<span class="number">0</span>},{<span class="number">0</span>,<span class="number">20</span>},
+    original_fieldnames={<span class="string">"One"</span>,<span class="string">"Two"</span>},fieldnames={<span class="string">"One"</span>,<span class="string">"Two"</span>},delim=<span class="string">","</span>
+})</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/test-listcallbacks.lua.html b/Data/Libraries/Penlight/docs/examples/test-listcallbacks.lua.html
new file mode 100644
index 0000000..4416532
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/test-listcallbacks.lua.html
@@ -0,0 +1,138 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><strong>test-listcallbacks.lua</strong></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>test-listcallbacks.lua</h2>
+<pre>
+<span class="comment">-- demonstrates how to use a list of callbacks
+</span><span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> utils = <span class="global">require</span> <span class="string">'pl.utils'</span>
+<span class="keyword">local</span> actions = List()
+<span class="keyword">local</span> L = utils.string_lambda
+
+actions:append(<span class="keyword">function</span>() <span class="global">print</span> <span class="string">'hello'</span> <span class="keyword">end</span>)
+actions:append(L <span class="string">'|| print "yay"'</span>)
+
+<span class="comment">-- '()' is a shortcut for operator.call or function(x) return x() end
+</span>actions:foreach <span class="string">'()'</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/test-pretty.lua.html b/Data/Libraries/Penlight/docs/examples/test-pretty.lua.html
new file mode 100644
index 0000000..a7493f3
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/test-pretty.lua.html
@@ -0,0 +1,140 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><strong>test-pretty.lua</strong></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>test-pretty.lua</h2>
+<pre>
+<span class="keyword">local</span> pretty = <span class="global">require</span> <span class="string">'pl.pretty'</span>
+
+<span class="keyword">local</span> tb = {
+    <span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},
+    alpha=<span class="number">1</span>,beta=<span class="number">2</span>,gamma=<span class="number">3</span>,[<span class="string">'&amp;'</span>]=<span class="keyword">true</span>,[<span class="number">0</span>]=<span class="keyword">false</span>,
+    _fred = {<span class="keyword">true</span>,<span class="keyword">true</span>},
+    s = <span class="string">[[
+hello dolly
+you're so fine
+]]</span>
+}
+
+<span class="global">print</span>(pretty.write(tb))</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/test-symbols.lua.html b/Data/Libraries/Penlight/docs/examples/test-symbols.lua.html
new file mode 100644
index 0000000..a847ab9
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/test-symbols.lua.html
@@ -0,0 +1,209 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><strong>test-symbols.lua</strong></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>test-symbols.lua</h2>
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+<span class="comment">-- force us to look in the script's directory when requiring...
+</span>app.require_here()
+<span class="global">require</span> <span class="string">'symbols'</span>
+
+<span class="keyword">local</span> MT = <span class="global">getmetatable</span>(_1)
+
+add = MT.__add
+mul = MT.__mul
+pow = MT.__pow
+
+
+<span class="keyword">function</span> testeq (e1,e2)
+    <span class="keyword">if</span> <span class="keyword">not</span> equals(e1,e2) <span class="keyword">then</span>
+        <span class="global">print</span> (<span class="string">'Not equal'</span>,repr(e1),repr(e2))
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+sin = register(<span class="global">math</span>.sin,<span class="string">'sin'</span>)
+
+f = register(<span class="keyword">function</span>(x,y,z) <span class="keyword">end</span>)
+
+<span class="comment">--[[
+testeq (_1,_1)
+testeq (_1+_2,_1+_2)
+testeq (_1 + 3*_2,_1 + 3*_2)
+testeq (_2+_1,_1+_2)
+testeq (sin(_1),sin(_1))
+testeq (1+f(10,20,'ok'),f(10,20,'ok')+1)
+--]]</span>
+
+
+<span class="keyword">function</span> testexpand (e)
+    <span class="global">print</span>(repr(fold(expand(e)))) <span class="comment">--fold
+</span><span class="keyword">end</span>
+
+<span class="comment">--[[
+testexpand (a*(a+1))
+
+testexpand ((x+2)*(b+1))
+]]</span><span class="comment">--
+</span>
+<span class="keyword">function</span> testfold (e)
+    <span class="global">print</span>(repr(fold(e)))
+<span class="keyword">end</span>
+
+a,b,c,x,y = Var <span class="string">'a,b,c,x,y'</span>
+
+<span class="comment">--~ testfold(_1 + _2)
+</span><span class="comment">--~ testfold(add(10,20))
+</span><span class="comment">--~ testfold(add(mul(2,_1),mul(3,_2)))
+</span><span class="comment">--[[
+testfold(sin(a))
+e = a^(b+2)
+testfold(e)
+bindval(b,1)
+testfold(e)
+bindval(a,2)
+testfold(e)
+
+bindval(a)
+bindval(b)
+]]</span>
+
+
+
+<span class="keyword">function</span> testdiff (e)
+    balance(e)
+    e = diff(e,x)
+    balance(e)
+    <span class="global">print</span>(<span class="string">'+ '</span>,e)
+    e = fold(e)
+    <span class="global">print</span>(<span class="string">'- '</span>,e)
+<span class="keyword">end</span>
+
+
+testdiff(x^<span class="number">2</span>+<span class="number">1</span>)
+testdiff(<span class="number">3</span>*x^<span class="number">2</span>)
+testdiff(x^<span class="number">2</span> + <span class="number">2</span>*x^<span class="number">3</span>)
+testdiff(x^<span class="number">2</span> + <span class="number">2</span>*a*x^<span class="number">3</span> + x^<span class="number">4</span>)
+testdiff(<span class="number">2</span>*a*x^<span class="number">3</span>)
+testdiff(x*x*x)</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testapp.lua.html b/Data/Libraries/Penlight/docs/examples/testapp.lua.html
new file mode 100644
index 0000000..56ae5a3
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testapp.lua.html
@@ -0,0 +1,133 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="../index.html">Index</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><strong>testapp.lua</strong></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.Set.html">pl.Set</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testapp.lua</h2>
+<pre>
+<span class="comment">-- shows how a script can get a private file path
+</span><span class="comment">-- the output on my Windows machine is:
+</span><span class="comment">-- C:\Documents and Settings\steve\.testapp\test.txt
+</span><span class="keyword">local</span> app = <span class="global">require</span> <span class="string">'pl.app'</span>
+<span class="global">print</span>(app.appfile <span class="string">'test.txt'</span>)</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+<i style="float:right;">Last updated 2018-11-23 21:07:42 </i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testclone.lua.html b/Data/Libraries/Penlight/docs/examples/testclone.lua.html
new file mode 100644
index 0000000..1e48839
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testclone.lua.html
@@ -0,0 +1,165 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><strong>testclone.lua</strong></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testclone.lua</h2>
+<pre>
+<span class="comment">--cloning a directory tree.
+</span><span class="keyword">local</span> lfs = <span class="global">require</span> <span class="string">'lfs'</span>
+<span class="keyword">local</span> path = <span class="global">require</span> <span class="string">'pl.path'</span>
+<span class="keyword">local</span> dir = <span class="global">require</span> <span class="string">'pl.dir'</span>
+
+<span class="keyword">local</span> p1 = <span class="string">[[examples]]</span>
+<span class="keyword">local</span> p2 = <span class="string">[[copy/of/examples]]</span>
+
+<span class="keyword">if</span> <span class="keyword">not</span> path.isfile <span class="string">'examples/testclone.lua'</span> <span class="keyword">then</span>
+	<span class="keyword">return</span> <span class="global">print</span> <span class="string">'please run this in the penlight folder (below examples)'</span>
+<span class="keyword">end</span>
+
+<span class="comment">-- make a copy of the examples folder
+</span>dir.clonetree(p1,p2,dir.copyfile)
+
+<span class="global">assert</span>(path.isdir <span class="string">'copy'</span>)
+
+<span class="global">print</span> <span class="string">'---'</span>
+<span class="keyword">local</span> t = <span class="global">os</span>.time()
+<span class="global">print</span>(lfs.touch(<span class="string">'examples/testclone.lua'</span>,t,t+<span class="number">10</span>))
+
+<span class="comment">-- this should only update this file
+</span>dir.clonetree(p1,p2,
+<span class="keyword">function</span>(f1,f2)
+  <span class="keyword">local</span> t1 = path.getmtime(f1)
+  <span class="keyword">local</span> t2 = path.getmtime(f2)
+  <span class="comment">--print(f1,t1,f2,t2)
+</span>  <span class="keyword">if</span> t1 &gt; t2 <span class="keyword">then</span>
+	dir.copyfile(f1,f2)
+	<span class="global">print</span>(f1,f2,t1,t2)
+  <span class="keyword">end</span>
+  <span class="keyword">return</span> <span class="keyword">true</span>
+<span class="keyword">end</span>)
+
+<span class="comment">-- and get rid of the whole copy directory, with subdirs
+</span>dir.rmtree <span class="string">'copy'</span>
+
+<span class="global">assert</span>(<span class="keyword">not</span> path.exists <span class="string">'copy'</span>)</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testconfig.lua.html b/Data/Libraries/Penlight/docs/examples/testconfig.lua.html
new file mode 100644
index 0000000..4ba947f
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testconfig.lua.html
@@ -0,0 +1,176 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><strong>testconfig.lua</strong></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testconfig.lua</h2>
+<pre>
+<span class="keyword">local</span> stringio = <span class="global">require</span> <span class="string">'pl.stringio'</span>
+<span class="keyword">local</span> config = <span class="global">require</span> <span class="string">'pl.config'</span>
+
+<span class="keyword">local</span> <span class="keyword">function</span> dump(t,indent)
+    <span class="keyword">if</span> <span class="global">type</span>(t) == <span class="string">'table'</span> <span class="keyword">then</span>
+        <span class="global">io</span>.write(indent,<span class="string">'{\n'</span>)
+        <span class="keyword">local</span> newindent = indent..<span class="string">'  '</span>
+        <span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(t) <span class="keyword">do</span>
+            <span class="global">io</span>.write(newindent,k,<span class="string">'='</span>)
+            dump(v,indent)
+            <span class="global">io</span>.write(<span class="string">'\n'</span>)
+        <span class="keyword">end</span>
+        <span class="global">io</span>.write(newindent,<span class="string">'},\n'</span>)
+    <span class="keyword">else</span>
+        <span class="global">io</span>.write(indent,t,<span class="string">'('</span>,<span class="global">type</span>(t),<span class="string">')'</span>)
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+
+<span class="keyword">local</span> <span class="keyword">function</span> testconfig(test)
+    <span class="keyword">local</span> f = stringio.open(test)
+    <span class="keyword">local</span> c = config.read(f)
+    f:close()
+    dump(c,<span class="string">'  '</span>)
+    <span class="global">print</span> <span class="string">'-----'</span>
+<span class="keyword">end</span>
+
+testconfig <span class="string">[[
+ ; comment 2 (an ini file)
+[section!]
+bonzo.dog=20,30
+config_parm=here we go again
+depth = 2
+[another]
+felix="cat"
+]]</span>
+
+testconfig <span class="string">[[
+# this is a more Unix-y config file
+fred = 1
+alice = 2
+home = /bonzo/dog/etc
+]]</span>
+
+testconfig <span class="string">[[
+# this is just a set of comma-separated values
+1000,444,222
+44,555,224
+]]</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testglobal.lua.html b/Data/Libraries/Penlight/docs/examples/testglobal.lua.html
new file mode 100644
index 0000000..e05a1f8
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testglobal.lua.html
@@ -0,0 +1,153 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><strong>testglobal.lua</strong></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testglobal.lua</h2>
+<pre>
+<span class="comment">-- very simple lexer program which looks at all identifiers in a Lua
+</span><span class="comment">-- file and checks whether they're in the global namespace.
+</span><span class="comment">-- At the end, we dump out the result of count_map, which will give us
+</span><span class="comment">-- unique identifiers with their usage count.
+</span><span class="comment">-- (an example of a program which itself needs to be careful about what
+</span><span class="comment">-- goes into the global namespace)
+</span>
+<span class="keyword">local</span> utils = <span class="global">require</span> <span class="string">'pl.utils'</span>
+<span class="keyword">local</span> file = <span class="global">require</span> <span class="string">'pl.file'</span>
+<span class="keyword">local</span> lexer = <span class="global">require</span> <span class="string">'pl.lexer'</span>
+<span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> pretty = <span class="global">require</span> <span class="string">'pl.pretty'</span>
+<span class="keyword">local</span> seq = <span class="global">require</span> <span class="string">'pl.seq'</span>
+<span class="keyword">local</span> path = <span class="global">require</span> <span class="string">'pl.path'</span>
+
+utils.on_error <span class="string">'quit'</span>
+
+<span class="keyword">local</span> txt = file.read(arg[<span class="number">1</span>] <span class="keyword">or</span> path.normpath(<span class="string">'examples/testglobal.lua'</span>))
+<span class="keyword">local</span> globals = List()
+<span class="keyword">for</span> t,v <span class="keyword">in</span> lexer.lua(txt) <span class="keyword">do</span>
+	<span class="keyword">if</span> t == <span class="string">'iden'</span> <span class="keyword">and</span> <span class="global">rawget</span>(_G,v) <span class="keyword">then</span>
+		globals:append(v)
+	<span class="keyword">end</span>
+<span class="keyword">end</span>
+
+pretty.dump(seq.count_map(globals))</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testinputfields.lua.html b/Data/Libraries/Penlight/docs/examples/testinputfields.lua.html
new file mode 100644
index 0000000..0fa63e4
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testinputfields.lua.html
@@ -0,0 +1,140 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><strong>testinputfields.lua</strong></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testinputfields.lua</h2>
+<pre>
+<span class="keyword">local</span> input = <span class="global">require</span> <span class="string">'pl.input'</span>
+<span class="keyword">local</span> sum = <span class="number">0.0</span>
+<span class="keyword">local</span> count = <span class="number">0</span>
+<span class="keyword">local</span> text = <span class="string">[[
+    981124001	2.0	18988.4	10047.1	4149.7
+    981125001	0.8	19104.0	9970.4	5088.7
+    981127003	0.5	19012.5	9946.9	3831.2
+]]</span>
+<span class="keyword">for</span> id,magn,x <span class="keyword">in</span> input.fields(<span class="number">3</span>,<span class="string">' '</span>,text) <span class="keyword">do</span>
+  sum = sum + x
+  count = count + <span class="number">1</span>
+<span class="keyword">end</span>
+<span class="global">print</span>(<span class="string">'average x coord is '</span>,sum/count)</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testinputfields2.lua.html b/Data/Libraries/Penlight/docs/examples/testinputfields2.lua.html
new file mode 100644
index 0000000..51a5acf
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testinputfields2.lua.html
@@ -0,0 +1,136 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><strong>testinputfields2.lua</strong></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testinputfields2.lua</h2>
+<pre>
+<span class="keyword">local</span> input = <span class="global">require</span> <span class="string">'pl.input'</span>
+<span class="keyword">local</span> seq = <span class="global">require</span> <span class="string">'pl.seq'</span>
+<span class="keyword">local</span> text = <span class="string">[[
+    981124001	2.0	18988.4	10047.1	4149.7
+    981125001	0.8	19104.0	9970.4	5088.7
+    981127003	0.5	19012.5	9946.9	3831.2
+]]</span>
+<span class="keyword">local</span> sum,count = seq.sum(input.fields ({<span class="number">3</span>},<span class="string">' '</span>,text))
+<span class="global">print</span>(sum/count)</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/testxml.lua.html b/Data/Libraries/Penlight/docs/examples/testxml.lua.html
new file mode 100644
index 0000000..c01fe3b
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/testxml.lua.html
@@ -0,0 +1,209 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><strong>testxml.lua</strong></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>testxml.lua</h2>
+<pre>
+<span class="comment">-- an example showing 'pl.lexer' doing some serious work.
+</span><span class="comment">-- The resulting Lua table is in the same LOM format used by luaexpat.
+</span><span class="comment">-- This is (clearly) not a professional XML parser, so don't use it
+</span><span class="comment">-- on your homework!
+</span>
+<span class="keyword">local</span> lexer = <span class="global">require</span> <span class="string">'pl.lexer'</span>
+<span class="keyword">local</span> pretty = <span class="global">require</span> <span class="string">'pl.pretty'</span>
+
+<span class="keyword">local</span> append = <span class="global">table</span>.insert
+<span class="keyword">local</span> skipws,expecting = lexer.skipws,lexer.expecting
+
+<span class="keyword">local</span> <span class="keyword">function</span> parse_element (tok,tag)
+	<span class="keyword">local</span> tbl,t,v,attrib
+	tbl = {}
+	tbl.tag = tag  <span class="comment">-- LOM 'tag' is the element tag
+</span>	t,v = skipws(tok)
+	<span class="keyword">while</span> v ~= <span class="string">'/'</span> <span class="keyword">and</span> v ~= <span class="string">'&gt;'</span> <span class="keyword">do</span>
+		<span class="keyword">if</span> t ~= <span class="string">'iden'</span> <span class="keyword">then</span> <span class="global">error</span>(<span class="string">'expecting attribute identifier'</span>) <span class="keyword">end</span>
+		attrib = v
+		expecting(tok,<span class="string">'='</span>)
+		v = expecting(tok,<span class="string">'string'</span>)
+		<span class="comment">-- LOM: 'attr' subtable contains attrib/value pairs and an ordered list of attribs
+</span>		<span class="keyword">if</span> <span class="keyword">not</span> tbl.attr <span class="keyword">then</span> tbl.attr = {} <span class="keyword">end</span>
+		tbl.attr[attrib] = v
+		append(tbl.attr,attrib)
+		t,v = skipws(tok)
+	<span class="keyword">end</span>
+	<span class="keyword">if</span> v == <span class="string">'/'</span> <span class="keyword">then</span>
+		expecting(tok,<span class="string">'&gt;'</span>)
+		<span class="keyword">return</span> tbl
+	<span class="keyword">end</span>
+	<span class="comment">-- pick up element data
+</span>	t,v = tok()
+	<span class="keyword">while</span> <span class="keyword">true</span> <span class="keyword">do</span>
+		<span class="keyword">if</span> t == <span class="string">'&lt;'</span> <span class="keyword">then</span>
+			t,v = skipws(tok)
+			<span class="keyword">if</span> t == <span class="string">'/'</span> <span class="keyword">then</span> <span class="comment">-- element end tag
+</span>				t,v = tok()
+				<span class="keyword">if</span> t == <span class="string">'&gt;'</span> <span class="keyword">then</span> <span class="keyword">return</span> tbl <span class="keyword">end</span>
+				<span class="keyword">if</span> t == <span class="string">'iden'</span> <span class="keyword">and</span> v == tag <span class="keyword">then</span>
+					<span class="keyword">if</span> tok() == <span class="string">'&gt;'</span> <span class="keyword">then</span> <span class="keyword">return</span> tbl <span class="keyword">end</span>
+				<span class="keyword">end</span>
+				<span class="global">error</span>(<span class="string">'expecting end tag '</span>..tag)
+			<span class="keyword">else</span>
+				append(tbl,parse_element(tok,v)) <span class="comment">-- LOM: child elements added to table
+</span>				t,v = skipws(tok)
+			<span class="keyword">end</span>
+		<span class="keyword">else</span>
+			append(tbl,v) <span class="comment">-- LOM: text added to table
+</span>			t,v = skipws(tok)
+		<span class="keyword">end</span>
+	<span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> <span class="keyword">function</span> parse_xml (tok)
+	<span class="keyword">local</span> t = skipws(tok)
+	<span class="keyword">local</span> v
+	<span class="keyword">while</span> t == <span class="string">'&lt;'</span> <span class="keyword">do</span>
+		t,v = tok()
+		<span class="keyword">if</span> t == <span class="string">'?'</span> <span class="keyword">or</span> t == <span class="string">'!'</span> <span class="keyword">then</span>
+			<span class="comment">-- skip meta stuff and commentary
+</span>			<span class="keyword">repeat</span> t = tok() <span class="keyword">until</span> t == <span class="string">'&gt;'</span>
+			t = expecting(tok,<span class="string">'&lt;'</span>)
+		<span class="keyword">else</span>
+			<span class="keyword">return</span> parse_element(tok,v)
+		<span class="keyword">end</span>
+	<span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> s = <span class="string">[[
+&lt;?xml version="1.0" encoding="UTF-8"?&gt;
+&lt;sensor name="closure-meter-2" id="7D7D0600006F0D00" loc="100,100,0" device="closure-meter" init="true"&gt;
+&lt;detector name="closure-meter" phenomenon="closure" units="mm" id="1"
+    vmin="0" vmax="5000" device="closure-meter" calib="0,0;5000,5000"
+    sampling_interval="25000" measurement_interval="600000"
+/&gt;
+&lt;/sensor&gt;
+]]</span>
+
+<span class="keyword">local</span> tok = lexer.scan(s,<span class="keyword">nil</span>,{space=<span class="keyword">false</span>},{<span class="global">string</span>=<span class="keyword">true</span>})
+<span class="keyword">local</span> res = parse_xml(tok)
+<span class="global">print</span>(pretty.write(res))</pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/examples/which.lua.html b/Data/Libraries/Penlight/docs/examples/which.lua.html
new file mode 100644
index 0000000..d5e8961
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/examples/which.lua.html
@@ -0,0 +1,155 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><strong>which.lua</strong></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+    <h2>which.lua</h2>
+<pre>
+<span class="comment">-- a simple implementation of the which command. This looks for
+</span><span class="comment">-- the given file on the path. On windows, it will assume an extension
+</span><span class="comment">-- of .exe if no extension is given.
+</span><span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> path = <span class="global">require</span> <span class="string">'pl.path'</span>
+<span class="keyword">local</span> app = <span class="global">require</span> <span class="string">'pl.app'</span>
+
+<span class="keyword">local</span> pathl = List.split(<span class="global">os</span>.getenv <span class="string">'PATH'</span>,path.dirsep)
+
+<span class="keyword">local</span> <span class="keyword">function</span> which (file)
+    <span class="keyword">local</span> res = pathl:map(path.join,file)
+    res = res:filter(path.exists)
+    <span class="keyword">if</span> res <span class="keyword">then</span> <span class="keyword">return</span> res[<span class="number">1</span>] <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> _,lua = app.lua()
+<span class="keyword">local</span> file = arg[<span class="number">1</span>] <span class="keyword">or</span> lua <span class="comment">-- i.e. location of lua executable
+</span><span class="keyword">local</span> try
+
+<span class="keyword">if</span> <span class="keyword">not</span> file <span class="keyword">then</span> <span class="keyword">return</span> <span class="global">print</span> <span class="string">'must provide a filename'</span> <span class="keyword">end</span>
+
+<span class="keyword">if</span> path.extension(file) == <span class="string">''</span> <span class="keyword">and</span> path.is_windows <span class="keyword">then</span>
+    try = which(file..<span class="string">'.exe'</span>)
+<span class="keyword">else</span>
+    try = which(file)
+<span class="keyword">end</span>
+
+<span class="keyword">if</span> try <span class="keyword">then</span> <span class="global">print</span>(try) <span class="keyword">else</span> <span class="global">print</span> <span class="string">'cannot find on path'</span> <span class="keyword">end</span></pre>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/index.html b/Data/Libraries/Penlight/docs/index.html
new file mode 100644
index 0000000..b7e9465
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/index.html
@@ -0,0 +1,392 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="libraries/pl.html">pl</a></li>
+  <li><a href="libraries/pl.app.html">pl.app</a></li>
+  <li><a href="libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="libraries/pl.class.html">pl.class</a></li>
+  <li><a href="libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="libraries/pl.config.html">pl.config</a></li>
+  <li><a href="libraries/pl.data.html">pl.data</a></li>
+  <li><a href="libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="libraries/pl.file.html">pl.file</a></li>
+  <li><a href="libraries/pl.func.html">pl.func</a></li>
+  <li><a href="libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="libraries/pl.input.html">pl.input</a></li>
+  <li><a href="libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="libraries/pl.path.html">pl.path</a></li>
+  <li><a href="libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="libraries/pl.template.html">pl.template</a></li>
+  <li><a href="libraries/pl.test.html">pl.test</a></li>
+  <li><a href="libraries/pl.text.html">pl.text</a></li>
+  <li><a href="libraries/pl.types.html">pl.types</a></li>
+  <li><a href="libraries/pl.url.html">pl.url</a></li>
+  <li><a href="libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="classes/pl.List.html">pl.List</a></li>
+  <li><a href="classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="manual/06-data.md.html">Data</a></li>
+  <li><a href="manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+  <h2>Penlight Lua Libraries 1.11.0</h2>
+  <p>Penlight is a set of pure Lua libraries for making it easier to work with common tasks like iterating over directories, reading configuration files and the like. Provides functional operations on tables and sequences. Visit the <a href="https://github.com/lunarmodules/Penlight">GitHub project</a> to review the code or file issues. Skip to the <a href="manual/01-introduction.md.html#">introduction</a>.</p>
+
+<h2>Libraries</h2>
+<table class="module_list">
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.html">pl</a></td>
+		<td class="summary">Entry point for loading all PL libraries only on demand, into the global space.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.app.html">pl.app</a></td>
+		<td class="summary">Application support functions.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.array2d.html">pl.array2d</a></td>
+		<td class="summary">Operations on two-dimensional arrays.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.class.html">pl.class</a></td>
+		<td class="summary">Provides a reuseable and convenient framework for creating classes in Lua.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.compat.html">pl.compat</a></td>
+		<td class="summary">Lua 5.1/5.2/5.3 compatibility.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.comprehension.html">pl.comprehension</a></td>
+		<td class="summary">List comprehensions implemented in Lua.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.config.html">pl.config</a></td>
+		<td class="summary">Reads configuration files into a Lua table.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.data.html">pl.data</a></td>
+		<td class="summary">Reading and querying simple tabular data.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.dir.html">pl.dir</a></td>
+		<td class="summary">Listing files in directories and creating/removing directory paths.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.file.html">pl.file</a></td>
+		<td class="summary">File manipulation functions: reading, writing, moving and copying.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.func.html">pl.func</a></td>
+		<td class="summary">Functional helpers like composition, binding and placeholder expressions.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.import_into.html">pl.import_into</a></td>
+		<td class="summary">PL loader, for loading all PL libraries, only on demand.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.input.html">pl.input</a></td>
+		<td class="summary">Iterators for extracting words or numbers from an input source.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.lapp.html">pl.lapp</a></td>
+		<td class="summary">Simple command-line parsing using human-readable specification.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.lexer.html">pl.lexer</a></td>
+		<td class="summary">Lexical scanner for creating a sequence of tokens from text.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.luabalanced.html">pl.luabalanced</a></td>
+		<td class="summary">Extract delimited Lua sequences from strings.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.operator.html">pl.operator</a></td>
+		<td class="summary">Lua operators available as functions.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.path.html">pl.path</a></td>
+		<td class="summary">Path manipulation and file queries.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.permute.html">pl.permute</a></td>
+		<td class="summary">Permutation operations.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.pretty.html">pl.pretty</a></td>
+		<td class="summary">Pretty-printing Lua tables.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.seq.html">pl.seq</a></td>
+		<td class="summary">Manipulating iterators as sequences.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.sip.html">pl.sip</a></td>
+		<td class="summary">Simple Input Patterns (SIP).</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.strict.html">pl.strict</a></td>
+		<td class="summary">Checks uses of undeclared global variables.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.stringio.html">pl.stringio</a></td>
+		<td class="summary">Reading and writing strings using file-like objects.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.stringx.html">pl.stringx</a></td>
+		<td class="summary">Python-style extended string library.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.tablex.html">pl.tablex</a></td>
+		<td class="summary">Extended operations on Lua tables.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.template.html">pl.template</a></td>
+		<td class="summary">A template preprocessor.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.test.html">pl.test</a></td>
+		<td class="summary">Useful test utilities.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.text.html">pl.text</a></td>
+		<td class="summary">Text processing utilities.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.types.html">pl.types</a></td>
+		<td class="summary">Dealing with Detailed Type Information</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.url.html">pl.url</a></td>
+		<td class="summary">Python-style URL quoting library.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.utils.html">pl.utils</a></td>
+		<td class="summary">Generally useful routines.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="libraries/pl.xml.html">pl.xml</a></td>
+		<td class="summary">XML LOM Utilities.</td>
+	</tr>
+</table>
+<h2>Classes</h2>
+<table class="module_list">
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.Date.html">pl.Date</a></td>
+		<td class="summary">Date and Date Format classes.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.List.html">pl.List</a></td>
+		<td class="summary">Python-style list class.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.Map.html">pl.Map</a></td>
+		<td class="summary">A Map class.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.MultiMap.html">pl.MultiMap</a></td>
+		<td class="summary">MultiMap, a Map which has multiple values per key.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.OrderedMap.html">pl.OrderedMap</a></td>
+		<td class="summary">OrderedMap, a map which preserves ordering.</td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="classes/pl.Set.html">pl.Set</a></td>
+		<td class="summary">A Set class.</td>
+	</tr>
+</table>
+<h2>Manual</h2>
+<table class="module_list">
+	<tr>
+		<td class="name"  nowrap><a href="manual/01-introduction.md.html">01-introduction.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/02-arrays.md.html">02-arrays.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/03-strings.md.html">03-strings.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/04-paths.md.html">04-paths.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/05-dates.md.html">05-dates.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/06-data.md.html">06-data.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/07-functional.md.html">07-functional.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/08-additional.md.html">08-additional.md</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="manual/09-discussion.md.html">09-discussion.md</a></td>
+		<td class="summary"></td>
+	</tr>
+</table>
+<h2>Examples</h2>
+<table class="module_list">
+	<tr>
+		<td class="name"  nowrap><a href="examples/seesubst.lua.html">seesubst.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/sipscan.lua.html">sipscan.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/symbols.lua.html">symbols.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/test-cmp.lua.html">test-cmp.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/test-data.lua.html">test-data.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/test-pretty.lua.html">test-pretty.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/test-symbols.lua.html">test-symbols.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testclone.lua.html">testclone.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testconfig.lua.html">testconfig.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testglobal.lua.html">testglobal.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testinputfields.lua.html">testinputfields.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testinputfields2.lua.html">testinputfields2.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/testxml.lua.html">testxml.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+	<tr>
+		<td class="name"  nowrap><a href="examples/which.lua.html">which.lua</a></td>
+		<td class="summary"></td>
+	</tr>
+</table>
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
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+    padding-left: 1em;
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+    background-color: #ffffff;
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+
+#about {
+    clear: both;
+    padding-left: 1em;
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+pre .number { color: #f8660d; }
+pre .operator { color: #2239a8; font-weight: bold; }
+pre .preprocessor, pre .prepro { color: #a33243; }
+pre .global { color: #800080; }
+pre .user-keyword { color: #800080; }
+pre .prompt { color: #558817; }
+pre .url { color: #272fc2; text-decoration: underline; }
+
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.Set.html b/Data/Libraries/Penlight/docs/libraries/pl.Set.html
new file mode 100644
index 0000000..8eda41e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.Set.html
@@ -0,0 +1,650 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="../index.html">Index</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#metamethods">metamethods</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><strong>pl.Set</strong></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testapp.lua.html">testapp.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.Set</code></h1>
+<p>A Set class.</p>
+<p>
+
+<pre>
+&gt; Set = <span class="global">require</span> <span class="string">'pl.Set'</span>
+&gt; = Set{<span class="string">'one'</span>,<span class="string">'two'</span>} == Set{<span class="string">'two'</span>,<span class="string">'one'</span>}
+<span class="keyword">true</span>
+&gt; fruit = Set{<span class="string">'apple'</span>,<span class="string">'banana'</span>,<span class="string">'orange'</span>}
+&gt; = fruit[<span class="string">'banana'</span>]
+<span class="keyword">true</span>
+&gt; = fruit[<span class="string">'hazelnut'</span>]
+<span class="keyword">nil</span>
+&gt; colours = Set{<span class="string">'red'</span>,<span class="string">'orange'</span>,<span class="string">'green'</span>,<span class="string">'blue'</span>}
+&gt; = fruit,colours
+[apple,orange,banana]   [blue,green,orange,red]
+&gt; = fruit+colours
+[blue,green,apple,red,orange,banana]
+[orange]
+&gt; more_fruits = fruit + <span class="string">'apricot'</span>
+&gt; = fruit*colours
+ =  more_fruits, fruit
+banana,apricot,apple,orange]    [banana,apple,orange]
+</pre>
+
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.class.html#">pl.class</a>, <a href="../classes/pl.Map.html#">pl.Map</a>, (<a href="../classes/pl.List.html#">pl.List</a> if __tostring is used)</p></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#Set">Set (t)</a></td>
+	<td class="summary">create a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#values">values (self)</a></td>
+	<td class="summary">get a list of the values in a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map">map (self, fn, ...)</a></td>
+	<td class="summary">map a function over the values of a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#union">union (self, set)</a></td>
+	<td class="summary">union of two sets (also +).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#intersection">intersection (self, set)</a></td>
+	<td class="summary">intersection of two sets (also *).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#difference">difference (self, set)</a></td>
+	<td class="summary">new set with elements in the set that are not in the other (also -).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#issubset">issubset (self, set)</a></td>
+	<td class="summary">is the first set a subset of the second (also &lt;)?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isempty">isempty (self)</a></td>
+	<td class="summary">is the set empty?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isdisjoint">isdisjoint (s1, s2)</a></td>
+	<td class="summary">are the sets disjoint?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#len">len (s)</a></td>
+	<td class="summary">size of this set (also # for 5.2).</td>
+	</tr>
+</table>
+<h2><a href="#metamethods">metamethods</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#__tostring">__tostring ()</a></td>
+	<td class="summary">string representation of a set.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__add">__add ()</a></td>
+	<td class="summary">union of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__mul">__mul ()</a></td>
+	<td class="summary">intersection of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__sub">__sub ()</a></td>
+	<td class="summary">difference of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__pow">__pow ()</a></td>
+	<td class="summary">symmetric difference of sets.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__lt">__lt ()</a></td>
+	<td class="summary">first set subset of second?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__len">__len ()</a></td>
+	<td class="summary">cardinality of set (5.2).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#__eq">__eq (s1, s2)</a></td>
+	<td class="summary">equality between sets.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "Set"></a>
+    <strong>Set (t)</strong>
+    </dt>
+    <dd>
+    create a set.  <br>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         may be a Set, Map or list-like table.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "values"></a>
+    <strong>values (self)</strong>
+    </dt>
+    <dd>
+    get a list of the values in a set.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "map"></a>
+    <strong>map (self, fn, ...)</strong>
+    </dt>
+    <dd>
+    map a function over the values of a set.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">fn</span>
+         a function
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments to pass to the function.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "union"></a>
+    <strong>union (self, set)</strong>
+    </dt>
+    <dd>
+    union of two sets (also +).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "intersection"></a>
+    <strong>intersection (self, set)</strong>
+    </dt>
+    <dd>
+    intersection of two sets (also *).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">&gt; s = Set{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+&gt; t = Set{<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = t
+[<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>]
+&gt; = Set.intersection(s,t)
+[<span class="number">30</span>,<span class="number">20</span>]
+&gt; = s*t
+[<span class="number">30</span>,<span class="number">20</span>]</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "difference"></a>
+    <strong>difference (self, set)</strong>
+    </dt>
+    <dd>
+    new set with elements in the set that are not in the other (also -).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "issubset"></a>
+    <strong>issubset (self, set)</strong>
+    </dt>
+    <dd>
+    is the first set a subset of the second (also &lt;)?.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+        <li><span class="parameter">set</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isempty"></a>
+    <strong>isempty (self)</strong>
+    </dt>
+    <dd>
+    is the set empty?.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">self</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isdisjoint"></a>
+    <strong>isdisjoint (s1, s2)</strong>
+    </dt>
+    <dd>
+    are the sets disjoint?  (no elements in common).
+ Uses naive definition, i.e. that intersection is empty
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+         a Set
+        </li>
+        <li><span class="parameter">s2</span>
+         another set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "len"></a>
+    <strong>len (s)</strong>
+    </dt>
+    <dd>
+    size of this set (also # for 5.2).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         a Set
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        size
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="metamethods"></a>metamethods</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "__tostring"></a>
+    <strong>__tostring ()</strong>
+    </dt>
+    <dd>
+    string representation of a set.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__add"></a>
+    <strong>__add ()</strong>
+    </dt>
+    <dd>
+    union of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__mul"></a>
+    <strong>__mul ()</strong>
+    </dt>
+    <dd>
+    intersection of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__sub"></a>
+    <strong>__sub ()</strong>
+    </dt>
+    <dd>
+    difference of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__pow"></a>
+    <strong>__pow ()</strong>
+    </dt>
+    <dd>
+    symmetric difference of sets.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__lt"></a>
+    <strong>__lt ()</strong>
+    </dt>
+    <dd>
+    first set subset of second?
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__len"></a>
+    <strong>__len ()</strong>
+    </dt>
+    <dd>
+    cardinality of set (5.2).
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "__eq"></a>
+    <strong>__eq (s1, s2)</strong>
+    </dt>
+    <dd>
+    equality between sets.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+
+        </li>
+        <li><span class="parameter">s2</span>
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+<i style="float:right;">Last updated 2018-11-23 21:07:42 </i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.app.html b/Data/Libraries/Penlight/docs/libraries/pl.app.html
new file mode 100644
index 0000000..4417e8f
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.app.html
@@ -0,0 +1,397 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><strong>pl.app</strong></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.app</code></h1>
+<p>Application support functions.</p>
+<p> See <a href="../manual/01-introduction.md.html#Application_Support">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.path.html#">pl.path</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#script_name">script_name ()</a></td>
+	<td class="summary">return the name of the current script running.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#require_here">require_here (base)</a></td>
+	<td class="summary">prefixes the current script's path to the Lua module path.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#appfile">appfile (file)</a></td>
+	<td class="summary">return a suitable path for files private to this application.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#platform">platform ()</a></td>
+	<td class="summary">return string indicating operating system.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lua">lua ()</a></td>
+	<td class="summary">return the full command-line used to invoke this script.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#parse_args">parse_args (args, flags_with_values, flags_valid)</a></td>
+	<td class="summary">parse command-line arguments into flags and parameters.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "script_name"></a>
+    <strong>script_name ()</strong>
+    </dt>
+    <dd>
+    return the name of the current script running.
+ The name will be the name as passed on the command line
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        string filename
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "require_here"></a>
+    <strong>require_here (base)</strong>
+    </dt>
+    <dd>
+    prefixes the current script's path to the Lua module path.
+ Applies to both the source and the binary module paths. It makes it easy for
+ the main file of a multi-file program to access its modules in the same directory.
+ <code>base</code> allows these modules to be put in a specified subdirectory, to allow for
+ cleaner deployment and resolve potential conflicts between a script name and its
+ library directory.</p>
+
+<p> Note: the path is prefixed, so it is searched first when requiring modules.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">base</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         optional base directory (absolute, or relative path).
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        the current script's path with a trailing slash
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "appfile"></a>
+    <strong>appfile (file)</strong>
+    </dt>
+    <dd>
+    return a suitable path for files private to this application.
+ These will look like '~/.SNAME/file', with '~' as with expanduser and
+ SNAME is the name of the script without .lua extension.
+ If the directory does not exist, it will be created.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a filename (w/out path)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a full pathname, or nil</li>
+        <li>
+        cannot create directory error</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- when run from a script called 'testapp' (on Windows):
+</span><span class="keyword">local</span> app = <span class="global">require</span> <span class="string">'pl.app'</span>
+<span class="global">print</span>(app.appfile <span class="string">'test.txt'</span>)
+<span class="comment">-- C:\Documents and Settings\steve\.testapp\test.txt</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "platform"></a>
+    <strong>platform ()</strong>
+    </dt>
+    <dd>
+    return string indicating operating system.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        'Windows','OSX' or whatever uname returns (e.g. 'Linux')
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lua"></a>
+    <strong>lua ()</strong>
+    </dt>
+    <dd>
+    return the full command-line used to invoke this script.
+ It will not include the scriptname itself, see <a href="../libraries/pl.app.html#script_name">app.script_name</a>.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        command-line</li>
+        <li>
+        name of Lua program used</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- execute:  lua -lluacov -e 'print(_VERSION)' myscript.lua
+</span>
+<span class="comment">-- myscript.lua
+</span><span class="global">print</span>(<span class="global">require</span>(<span class="string">"pl.app"</span>).lua())  <span class="comment">--&gt; "lua -lluacov -e 'print(_VERSION)'", "lua"</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "parse_args"></a>
+    <strong>parse_args (args, flags_with_values, flags_valid)</strong>
+    </dt>
+    <dd>
+    parse command-line arguments into flags and parameters.
+ Understands GNU-style command-line flags; short (<code>-f</code>) and long (<code>--flag</code>).</p>
+
+<p> These may be given a value with either '=' or ':' (<code>-k:2</code>,<code>--alpha=3.2</code>,<code>-n2</code>),
+ a number value can be given without a space. If the flag is marked
+ as having a value, then a space-separated value is also accepted (<code>-i hello</code>),
+ see the <code>flags_with_values</code> argument).</p>
+
+<p> Multiple short args can be combined like so: ( <code>-abcd</code>).</p>
+
+<p> When specifying the <code>flags_valid</code> parameter, its contents can also contain
+ aliasses, to convert short/long flags to the same output name. See the
+ example below.</p>
+
+<p> Note: if a flag is repeated, the last value wins.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">args</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+         an array of strings (default is the global <code>arg</code>)
+        </li>
+        <li><span class="parameter">flags_with_values</span>
+            <span class="types"><span class="type">tab</span></span>
+         any flags that take values, either list or hash
+ table e.g. <code>{ out=true }</code> or <code>{ &quot;out&quot; }</code>.
+        </li>
+        <li><span class="parameter">flags_valid</span>
+            <span class="types"><span class="type">tab</span></span>
+         (optional) flags that are valid, either list or hashtable.
+ If not given, everything
+ will be accepted(everything in <code>flags_with_values</code> will automatically be allowed)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a table of flags (flag=value pairs)</li>
+        <li>
+        an array of parameters</li>
+    </ol>
+
+    <h3>Raises:</h3>
+    if args is nil, then the global <code>args</code> must be available!
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- Simple form:
+</span><span class="keyword">local</span> flags, params = app.parse_args(<span class="keyword">nil</span>,
+     { <span class="string">"hello"</span>, <span class="string">"world"</span> },  <span class="comment">-- list of flags taking values
+</span>     { <span class="string">"l"</span>, <span class="string">"a"</span>, <span class="string">"b"</span>})      <span class="comment">-- list of allowed flags (value ones will be added)
+</span>
+<span class="comment">-- More complex example using aliasses:
+</span><span class="keyword">local</span> valid = {
+    long = <span class="string">"l"</span>,           <span class="comment">-- if 'l' is specified, it is reported as 'long'
+</span>    new = { <span class="string">"n"</span>, <span class="string">"old"</span> }, <span class="comment">-- here both 'n' and 'old' will go into 'new'
+</span>}
+<span class="keyword">local</span> values = {
+    <span class="string">"value"</span>,   <span class="comment">-- will automatically be added to the allowed set of flags
+</span>    <span class="string">"new"</span>,     <span class="comment">-- will mark 'n' and 'old' as requiring a value as well
+</span>}
+<span class="keyword">local</span> flags, params = app.parse_args(<span class="keyword">nil</span>, values, valid)
+
+<span class="comment">-- command:  myapp.lua -l --old:hello --value world param1 param2
+</span><span class="comment">-- will yield:
+</span>flags = {
+    long = <span class="keyword">true</span>,     <span class="comment">-- input from 'l'
+</span>    new = <span class="string">"hello"</span>,   <span class="comment">-- input from 'old'
+</span>    value = <span class="string">"world"</span>, <span class="comment">-- allowed because it was in 'values', note: space separated!
+</span>}
+params = {
+    [<span class="number">1</span>] = <span class="string">"param1"</span>
+    [<span class="number">2</span>] = <span class="string">"param2"</span>
+}</pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.array2d.html b/Data/Libraries/Penlight/docs/libraries/pl.array2d.html
new file mode 100644
index 0000000..8ee905b
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.array2d.html
@@ -0,0 +1,1319 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><strong>pl.array2d</strong></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.array2d</code></h1>
+<p>Operations on two-dimensional arrays.</p>
+<p> See <a href="../manual/02-arrays.md.html#Operations_on_two_dimensional_tables">The Guide</a></p>
+
+<p> The size of the arrays is determined by using the length operator <code>#</code> hence
+ the module is not <code>nil</code> safe, and the usual precautions apply.</p>
+
+<p> Note: all functions taking <code>i1,j1,i2,j2</code> as arguments will normalize the
+ arguments using <a href="../libraries/pl.array2d.html#default_range">default_range</a>.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.types.html#">pl.types</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#size">size (a)</a></td>
+	<td class="summary">return the row and column size.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#column">column (a, j)</a></td>
+	<td class="summary">extract a column from the 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#row">row (a, i)</a></td>
+	<td class="summary">extract a row from the 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map">map (f, a, arg)</a></td>
+	<td class="summary">map a function over a 2D array</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reduce_rows">reduce_rows (f, a)</a></td>
+	<td class="summary">reduce the rows using a function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reduce_cols">reduce_cols (f, a)</a></td>
+	<td class="summary">reduce the columns using a function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reduce2">reduce2 (opc, opr, a)</a></td>
+	<td class="summary">reduce a 2D array into a scalar, using two operations.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map2">map2 (f, ad, bd, a, b, arg)</a></td>
+	<td class="summary">map a function over two arrays.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#product">product (f, t1, t2)</a></td>
+	<td class="summary">cartesian product of two 1d arrays.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#flatten">flatten (t)</a></td>
+	<td class="summary">flatten a 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reshape">reshape (t, nrows, co)</a></td>
+	<td class="summary">reshape a 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#transpose">transpose (t)</a></td>
+	<td class="summary">transpose a 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#swap_rows">swap_rows (t, i1, i2)</a></td>
+	<td class="summary">swap two rows of an array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#swap_cols">swap_cols (t, j1, j2)</a></td>
+	<td class="summary">swap two columns of an array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#extract_rows">extract_rows (t, ridx)</a></td>
+	<td class="summary">extract the specified rows.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#extract_cols">extract_cols (t, cidx)</a></td>
+	<td class="summary">extract the specified columns.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#remove_row">remove_row (t, i)</a></td>
+	<td class="summary">remove a row from an array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#remove_col">remove_col (t, j)</a></td>
+	<td class="summary">remove a column from an array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#parse_range">parse_range (s)</a></td>
+	<td class="summary">parse a spreadsheet range.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#range">range (t, rstr)</a></td>
+	<td class="summary">get a slice of a 2D array using spreadsheet range notation.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#default_range">default_range (t, i1, j1, i2, j2)</a></td>
+	<td class="summary">normalizes coordinates to valid positive entries and defaults.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#slice">slice (t, i1, j1, i2, j2)</a></td>
+	<td class="summary">get a slice of a 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#set">set (t, value, i1, j1, i2, j2)</a></td>
+	<td class="summary">set a specified range of an array to a value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#write">write (t, f, fmt, i1, j1, i2, j2)</a></td>
+	<td class="summary">write a 2D array to a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#forall">forall (t, row_op, end_row_op, i1, j1, i2, j2)</a></td>
+	<td class="summary">perform an operation for all values in a 2D array.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#move">move (dest, di, dj, src, i1, j1, i2, j2)</a></td>
+	<td class="summary">move a block from the destination to the source.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#iter">iter (a, indices, i1, j1, i2, j2)</a></td>
+	<td class="summary">iterate over all elements in a 2D array, with optional indices.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#columns">columns (a)</a></td>
+	<td class="summary">iterate over all columns.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rows">rows (a)</a></td>
+	<td class="summary">iterate over all rows.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#new">new (rows, cols, val)</a></td>
+	<td class="summary">new array of specified dimensions</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "size"></a>
+    <strong>size (a)</strong>
+    </dt>
+    <dd>
+    return the row and column size.
+ Size is calculated using the Lua length operator #, so usual precautions
+ regarding <code>nil</code> values apply.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2d array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        number of rows (<code>#a</code>)</li>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        number of cols (<code>#a[1]</code>)</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "column"></a>
+    <strong>column (a, j)</strong>
+    </dt>
+    <dd>
+    extract a column from the 2D array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">j</span>
+         column index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        1d array
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "row"></a>
+    <strong>row (a, i)</strong>
+    </dt>
+    <dd>
+    extract a row from the 2D array.
+ Added in line with <a href="../libraries/pl.array2d.html#column">column</a>, for read-only purposes directly
+ accessing a[i] is more performant.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">i</span>
+         row index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        1d array (copy of the row)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "map"></a>
+    <strong>map (f, a, arg)</strong>
+    </dt>
+    <dd>
+    map a function over a 2D array
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">arg</span>
+         an optional extra argument to be passed to the function.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        2d array
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "reduce_rows"></a>
+    <strong>reduce_rows (f, a)</strong>
+    </dt>
+    <dd>
+    reduce the rows using a function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         a binary function
+        </li>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        1d array
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#reduce">pl.tablex.reduce</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "reduce_cols"></a>
+    <strong>reduce_cols (f, a)</strong>
+    </dt>
+    <dd>
+    reduce the columns using a function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         a binary function
+        </li>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        1d array
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#reduce">pl.tablex.reduce</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "reduce2"></a>
+    <strong>reduce2 (opc, opr, a)</strong>
+    </dt>
+    <dd>
+    reduce a 2D array into a scalar, using two operations.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">opc</span>
+            <span class="types"><span class="type">func</span></span>
+         operation to reduce the final result
+        </li>
+        <li><span class="parameter">opr</span>
+            <span class="types"><span class="type">func</span></span>
+         operation to reduce the rows
+        </li>
+        <li><span class="parameter">a</span>
+         2D array
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "map2"></a>
+    <strong>map2 (f, ad, bd, a, b, arg)</strong>
+    </dt>
+    <dd>
+    map a function over two arrays.
+ They can be both or either 2D arrays
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         function of at least two arguments
+        </li>
+        <li><span class="parameter">ad</span>
+            <span class="types"><span class="type">int</span></span>
+         order of first array (<code>1</code> if <code>a</code> is a list/array, <code>2</code> if it is a 2d array)
+        </li>
+        <li><span class="parameter">bd</span>
+            <span class="types"><span class="type">int</span></span>
+         order of second array (<code>1</code> if <code>b</code> is a list/array, <code>2</code> if it is a 2d array)
+        </li>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">tab</span></span>
+         1d or 2d array
+        </li>
+        <li><span class="parameter">b</span>
+            <span class="types"><span class="type">tab</span></span>
+         1d or 2d array
+        </li>
+        <li><span class="parameter">arg</span>
+         optional extra argument to pass to function
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        2D array, unless both arrays are 1D
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "product"></a>
+    <strong>product (f, t1, t2)</strong>
+    </dt>
+    <dd>
+    cartesian product of two 1d arrays.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of 2 arguments
+        </li>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">array</span></span>
+         a 1d table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">array</span></span>
+         a 1d table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        2d table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">product(<span class="string">'..'</span>,{<span class="number">1</span>,<span class="number">2</span>},{<span class="string">'a'</span>,<span class="string">'b'</span>}) == {{<span class="string">'1a'</span>,<span class="string">'2a'</span>},{<span class="string">'1b'</span>,<span class="string">'2b'</span>}}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "flatten"></a>
+    <strong>flatten (t)</strong>
+    </dt>
+    <dd>
+    flatten a 2D array.
+ (this goes over columns first.)
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2d table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a 1d table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">flatten {{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">3</span>,<span class="number">4</span>},{<span class="number">5</span>,<span class="number">6</span>}} == {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "reshape"></a>
+    <strong>reshape (t, nrows, co)</strong>
+    </dt>
+    <dd>
+    reshape a 2D array.  Reshape the aray by specifying a new nr of rows.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">nrows</span>
+            <span class="types"><span class="type">int</span></span>
+         new number of rows
+        </li>
+        <li><span class="parameter">co</span>
+            <span class="types"><span class="type">bool</span></span>
+         use column-order (Fortran-style) (default false)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new 2d array
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "transpose"></a>
+    <strong>transpose (t)</strong>
+    </dt>
+    <dd>
+    transpose a 2D array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new 2d array
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "swap_rows"></a>
+    <strong>swap_rows (t, i1, i2)</strong>
+    </dt>
+    <dd>
+    swap two rows of an array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2d array
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         a row index
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         a row index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        t (same, modified 2d array)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "swap_cols"></a>
+    <strong>swap_cols (t, j1, j2)</strong>
+    </dt>
+    <dd>
+    swap two columns of an array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2d array
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         a column index
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         a column index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        t (same, modified 2d array)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "extract_rows"></a>
+    <strong>extract_rows (t, ridx)</strong>
+    </dt>
+    <dd>
+    extract the specified rows.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">ridx</span>
+            <span class="types"><span class="type">{int}</span></span>
+         a table of row indices
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new 2d array with the extracted rows
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "extract_cols"></a>
+    <strong>extract_cols (t, cidx)</strong>
+    </dt>
+    <dd>
+    extract the specified columns.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2d array
+        </li>
+        <li><span class="parameter">cidx</span>
+            <span class="types"><span class="type">{int}</span></span>
+         a table of column indices
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new 2d array with the extracted colums
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "remove_row"></a>
+    <strong>remove_row (t, i)</strong>
+    </dt>
+    <dd>
+    remove a row from an array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2d array
+        </li>
+        <li><span class="parameter">i</span>
+            <span class="types"><span class="type">int</span></span>
+         a row index
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "remove_col"></a>
+    <strong>remove_col (t, j)</strong>
+    </dt>
+    <dd>
+    remove a column from an array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2d array
+        </li>
+        <li><span class="parameter">j</span>
+            <span class="types"><span class="type">int</span></span>
+         a column index
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "parse_range"></a>
+    <strong>parse_range (s)</strong>
+    </dt>
+    <dd>
+    parse a spreadsheet range.
+ The range can be specified either as 'A1:B2' or 'R1C1:R2C2';
+ a special case is a single element (e.g 'A1' or 'R1C1')
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a range (case insensitive).
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        start row</li>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        start col</li>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        end row</li>
+        <li>
+           <span class="types"><span class="type">int</span></span>
+        end col</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "range"></a>
+    <strong>range (t, rstr)</strong>
+    </dt>
+    <dd>
+    get a slice of a 2D array using spreadsheet range notation.  @see parse_range
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">rstr</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         range expression
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a slice
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <li><a href="../libraries/pl.array2d.html#parse_range">array2d.parse_range</a></li>
+         <li><a href="../libraries/pl.array2d.html#slice">array2d.slice</a></li>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "default_range"></a>
+    <strong>default_range (t, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    normalizes coordinates to valid positive entries and defaults.
+ Negative indices will be counted from the end, too low, or too high
+ will be limited by the array sizes.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+ return i1, j1, i2, j2
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "slice"></a>
+    <strong>slice (t, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    get a slice of a 2D array.  Note that if the specified range has
+ a 1D result, the rank of the result will be 1.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an array, 2D in general but 1D in special cases.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "set"></a>
+    <strong>set (t, value, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    set a specified range of an array to a value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">value</span>
+         the value (may be a function, called as <code>val(i,j)</code>)
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#set">tablex.set</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "write"></a>
+    <strong>write (t, f, fmt, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    write a 2D array to a file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">f</span>
+         a file object (default stdout)
+        </li>
+        <li><span class="parameter">fmt</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a format string (default is just to use tostring)
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "forall"></a>
+    <strong>forall (t, row_op, end_row_op, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    perform an operation for all values in a 2D array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         2D array
+        </li>
+        <li><span class="parameter">row_op</span>
+            <span class="types"><span class="type">func</span></span>
+         function to call on each value; <code>row_op(row,j)</code>
+        </li>
+        <li><span class="parameter">end_row_op</span>
+            <span class="types"><span class="type">func</span></span>
+         function to call at end of each row; <code>end_row_op(i)</code>
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "move"></a>
+    <strong>move (dest, di, dj, src, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    move a block from the destination to the source.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">dest</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">di</span>
+            <span class="types"><span class="type">int</span></span>
+         start row in dest
+        </li>
+        <li><span class="parameter">dj</span>
+            <span class="types"><span class="type">int</span></span>
+         start col in dest
+        </li>
+        <li><span class="parameter">src</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "iter"></a>
+    <strong>iter (a, indices, i1, j1, i2, j2)</strong>
+    </dt>
+    <dd>
+    iterate over all elements in a 2D array, with optional indices.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         2D array
+        </li>
+        <li><span class="parameter">indices</span>
+            <span class="types"><span class="type">bool</span></span>
+         with indices (default false)
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start row (default 1)
+        </li>
+        <li><span class="parameter">j1</span>
+            <span class="types"><span class="type">int</span></span>
+         start col (default 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end row   (default N)
+        </li>
+        <li><span class="parameter">j2</span>
+            <span class="types"><span class="type">int</span></span>
+         end col   (default M)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        either <code>value</code> or <code>i,j,value</code> depending on the value of <code>indices</code>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "columns"></a>
+    <strong>columns (a)</strong>
+    </dt>
+    <dd>
+    iterate over all columns.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        column, column-index
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "rows"></a>
+    <strong>rows (a)</strong>
+    </dt>
+    <dd>
+    iterate over all rows.
+ Returns a copy of the row, for read-only purrposes directly iterating
+ is more performant; <code>ipairs(a)</code>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+            <span class="types"><span class="type">array</span></span>
+         a 2D array
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        row, row-index
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "new"></a>
+    <strong>new (rows, cols, val)</strong>
+    </dt>
+    <dd>
+    new array of specified dimensions
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">rows</span>
+            <span class="types"><span class="type">int</span></span>
+         number of rows
+        </li>
+        <li><span class="parameter">cols</span>
+            <span class="types"><span class="type">int</span></span>
+         number of cols
+        </li>
+        <li><span class="parameter">val</span>
+         initial value; if it's a function then use <code>val(i,j)</code>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        new 2d array
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.class.html b/Data/Libraries/Penlight/docs/libraries/pl.class.html
new file mode 100644
index 0000000..b623e94
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.class.html
@@ -0,0 +1,332 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><strong>pl.class</strong></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.class</code></h1>
+<p>Provides a reuseable and convenient framework for creating classes in Lua.</p>
+<p> Two possible notations:</p>
+
+
+<pre>
+B = class(A)
+class.B(A)
+</pre>
+
+<p> The latter form creates a named class within the current environment. Note
+ that this implicitly brings in <a href="../libraries/pl.utils.html#">pl.utils</a> as a dependency.</p>
+
+<p> See the Guide for further <a href="../manual/01-introduction.md.html#Simplifying_Object_Oriented_Programming_in_Lua">discussion</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#_init">_init (...)</a></td>
+	<td class="summary">initializes an <strong>instance</strong> upon creation.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#instance:is_a">instance:is_a (some_class)</a></td>
+	<td class="summary">checks whether an <strong>instance</strong> is derived from some class.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#some_class:class_of">some_class:class_of (some_instance)</a></td>
+	<td class="summary">checks whether an <strong>instance</strong> is derived from some class.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#some_class:cast">some_class:cast (some_instance)</a></td>
+	<td class="summary">cast an object to another class.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#class">class (base, c_arg, c)</a></td>
+	<td class="summary">create a new class, derived from a given base class.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "_init"></a>
+    <strong>_init (...)</strong>
+    </dt>
+    <dd>
+    initializes an <strong>instance</strong> upon creation.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         parameters passed to the constructor
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> Cat = class()
+<span class="keyword">function</span> Cat:_init(name)
+  <span class="comment">--self:super(name)   -- call the ancestor initializer if needed
+</span>  self.name = name
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> pussycat = Cat(<span class="string">"pussycat"</span>)
+<span class="global">print</span>(pussycat.name)  <span class="comment">--&gt; pussycat</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "instance:is_a"></a>
+    <strong>instance:is_a (some_class)</strong>
+    </dt>
+    <dd>
+    checks whether an <strong>instance</strong> is derived from some class.
+ Works the other way around as <a href="../libraries/pl.class.html#some_class:class_of">class_of</a>. It has two ways of using;
+ 1) call with a class to check against, 2) call without params.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">some_class</span>
+         class to check against, or <code>nil</code> to return the class
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if <code>instance</code> is derived from <code>some_class</code>, or if <code>some_class == nil</code> then
+ it returns the class table of the instance
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> pussycat = Lion()  <span class="comment">-- assuming Lion derives from Cat
+</span><span class="keyword">if</span> pussycat:is_a(Cat) <span class="keyword">then</span>
+  <span class="comment">-- it's true, it is a Lion, but also a Cat
+</span><span class="keyword">end</span>
+
+<span class="keyword">if</span> pussycat:is_a() == Lion <span class="keyword">then</span>
+  <span class="comment">-- It's true
+</span><span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "some_class:class_of"></a>
+    <strong>some_class:class_of (some_instance)</strong>
+    </dt>
+    <dd>
+    checks whether an <strong>instance</strong> is derived from some class.
+ Works the other way around as <a href="../libraries/pl.class.html#instance:is_a">is_a</a>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">some_instance</span>
+         instance to check against
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if <code>some_instance</code> is derived from <code>some_class</code>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> pussycat = Lion()  <span class="comment">-- assuming Lion derives from Cat
+</span><span class="keyword">if</span> Cat:class_of(pussycat) <span class="keyword">then</span>
+  <span class="comment">-- it's true
+</span><span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "some_class:cast"></a>
+    <strong>some_class:cast (some_instance)</strong>
+    </dt>
+    <dd>
+    cast an object to another class.
+ It is not clever (or safe!) so use carefully.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">some_instance</span>
+         the object to be changed
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "class"></a>
+    <strong>class (base, c_arg, c)</strong>
+    </dt>
+    <dd>
+    create a new class, derived from a given base class.
+ Supporting two class creation syntaxes:
+ either <code>Name = class(base)</code> or <code>class.Name(base)</code>.
+ The first form returns the class directly and does not set its <code>_name</code>.
+ The second form creates a variable <code>Name</code> in the current environment set
+ to the class, and also sets <code>_name</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">base</span>
+         optional base class
+        </li>
+        <li><span class="parameter">c_arg</span>
+         optional parameter to class constructor
+        </li>
+        <li><span class="parameter">c</span>
+         optional table to be used as class
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.compat.html b/Data/Libraries/Penlight/docs/libraries/pl.compat.html
new file mode 100644
index 0000000..6680030
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.compat.html
@@ -0,0 +1,580 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Fields">Fields</a></li>
+<li><a href="#Global_exported_functions__for_Lua_5_1___LuaJIT_">Global exported functions (for Lua 5.1 & LuaJIT) </a></li>
+<li><a href="#Global_exported_functions__for_Lua___5_4_">Global exported functions (for Lua < 5.4) </a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><strong>pl.compat</strong></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.compat</code></h1>
+<p>Lua 5.1/5.2/5.3 compatibility.</p>
+<p> Injects <a href="../libraries/pl.compat.html#table.pack">table.pack</a>, <a href="../libraries/pl.compat.html#table.unpack">table.unpack</a>, and <a href="../libraries/pl.compat.html#package.searchpath">package.searchpath</a> in the global
+ environment, to make sure they are available for Lua 5.1 and LuaJIT.</p>
+
+<p> All other functions are exported as usual in the returned module table.</p>
+
+<p> NOTE: everything in this module is also available in <a href="../libraries/pl.utils.html#">pl.utils</a>.</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#execute">execute (cmd)</a></td>
+	<td class="summary">execute a shell command, in a compatible and platform independent way.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#load">load (ld[, source[, mode[, env]]])</a></td>
+	<td class="summary">Load Lua code as a text or binary chunk (in a Lua 5.2 compatible way).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getfenv">getfenv (f)</a></td>
+	<td class="summary">Get environment of a function (in a Lua 5.1 compatible way).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#setfenv">setfenv (f, env)</a></td>
+	<td class="summary">Set environment of a function (in a Lua 5.1 compatible way).</td>
+	</tr>
+</table>
+<h2><a href="#Fields">Fields</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#lua51">lua51</a></td>
+	<td class="summary">boolean flag this is Lua 5.1 (or LuaJIT).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#jit">jit</a></td>
+	<td class="summary">boolean flag this is LuaJIT.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#jit52">jit52</a></td>
+	<td class="summary">boolean flag this is LuaJIT with 5.2 compatibility compiled in.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dir_separator">dir_separator</a></td>
+	<td class="summary">the directory separator character for the current platform.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_windows">is_windows</a></td>
+	<td class="summary">boolean flag this is a Windows platform.</td>
+	</tr>
+</table>
+<h2><a href="#Global_exported_functions__for_Lua_5_1___LuaJIT_">Global exported functions (for Lua 5.1 & LuaJIT) </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#table.pack">table.pack (...)</a></td>
+	<td class="summary">pack an argument list into a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#table.unpack">table.unpack (t[, i[, t]])</a></td>
+	<td class="summary">unpack a table and return the elements.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#package.searchpath">package.searchpath (name, path[, sep[, rep]])</a></td>
+	<td class="summary">return the full path where a file name would be matched.</td>
+	</tr>
+</table>
+<h2><a href="#Global_exported_functions__for_Lua___5_4_">Global exported functions (for Lua < 5.4) </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#warn">warn (...)</a></td>
+	<td class="summary">raise a warning message.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "execute"></a>
+    <strong>execute (cmd)</strong>
+    </dt>
+    <dd>
+    execute a shell command, in a compatible and platform independent way.
+ This is a compatibility function that returns the same for Lua 5.1 and
+ Lua 5.2+.</p>
+
+<p> NOTE: Windows systems can use signed 32bit integer exitcodes. Posix systems
+ only use exitcodes 0-255, anything else is undefined.</p>
+
+<p> NOTE2: In Lua 5.2 and 5.3 a Windows exitcode of -1 would not properly be
+ returned, this function will return it properly for all versions.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cmd</span>
+         a shell command
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        true if successful</li>
+        <li>
+        actual return code</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "load"></a>
+    <strong>load (ld[, source[, mode[, env]]])</strong>
+    </dt>
+    <dd>
+    Load Lua code as a text or binary chunk (in a Lua 5.2 compatible way).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">ld</span>
+         code string or loader
+        </li>
+        <li><span class="parameter">source</span>
+         name of chunk for errors
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">mode</span>
+         'b', 't' or 'bt'
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">env</span>
+         environment to load the chunk in
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getfenv"></a>
+    <strong>getfenv (f)</strong>
+    </dt>
+    <dd>
+    Get environment of a function (in a Lua 5.1 compatible way).
+ Not 100% compatible, so with Lua 5.2 it may return nil for a function with no
+ global references!
+ Based on code by <a href="http://lua-users.org/lists/lua-l/2010-06/msg00313.html">Sergey Rozhenko</a>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         a function or a call stack reference
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "setfenv"></a>
+    <strong>setfenv (f, env)</strong>
+    </dt>
+    <dd>
+    Set environment of a function (in a Lua 5.1 compatible way).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         a function or a call stack reference
+        </li>
+        <li><span class="parameter">env</span>
+         a table that becomes the new environment of <code>f</code>
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Fields"></a>Fields</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "lua51"></a>
+    <strong>lua51</strong>
+    </dt>
+    <dd>
+    boolean flag this is Lua 5.1 (or LuaJIT).
+
+
+    <ul>
+        <li><span class="parameter">lua51</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "jit"></a>
+    <strong>jit</strong>
+    </dt>
+    <dd>
+    boolean flag this is LuaJIT.
+
+
+    <ul>
+        <li><span class="parameter">jit</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "jit52"></a>
+    <strong>jit52</strong>
+    </dt>
+    <dd>
+    boolean flag this is LuaJIT with 5.2 compatibility compiled in.
+
+
+    <ul>
+        <li><span class="parameter">jit52</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "dir_separator"></a>
+    <strong>dir_separator</strong>
+    </dt>
+    <dd>
+    the directory separator character for the current platform.
+
+
+    <ul>
+        <li><span class="parameter">dir_separator</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_windows"></a>
+    <strong>is_windows</strong>
+    </dt>
+    <dd>
+    boolean flag this is a Windows platform.
+
+
+    <ul>
+        <li><span class="parameter">is_windows</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Global_exported_functions__for_Lua_5_1___LuaJIT_"></a>Global exported functions (for Lua 5.1 & LuaJIT) </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "table.pack"></a>
+    <strong>table.pack (...)</strong>
+    </dt>
+    <dd>
+    pack an argument list into a table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         any arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table with field n set to the length
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "table.unpack"></a>
+    <strong>table.unpack (t[, i[, t]])</strong>
+    </dt>
+    <dd>
+    unpack a table and return the elements. </p>
+
+<p> NOTE: this version does NOT honor the n field, and hence it is not nil-safe.
+ See <a href="../libraries/pl.utils.html#unpack">utils.unpack</a> for a version that is nil-safe.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         index of the last element to unpack, defaults to #t
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">i</span>
+         index from which to start unpacking, defaults to 1
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">t</span>
+         index of the last element to unpack, defaults to #t
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        multiple return values from the table
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#unpack">utils.unpack</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "package.searchpath"></a>
+    <strong>package.searchpath (name, path[, sep[, rep]])</strong>
+    </dt>
+    <dd>
+    return the full path where a file name would be matched.
+ This function was introduced in Lua 5.2, so this compatibility version
+ will be injected in Lua 5.1 engines.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         file name, possibly dotted
+        </li>
+        <li><span class="parameter">path</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a path-template in the same form as package.path or package.cpath
+        </li>
+        <li><span class="parameter">sep</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         template separate character to be replaced by path separator. Default: "."
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">rep</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the path separator to use, defaults to system separator. Default; "/" on Unixes, "\" on Windows.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        on success: path of the file</li>
+        <li>
+        on failure: nil, error string listing paths tried</li>
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.path.html#package_path">path.package_path</a>
+    </ul>
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Global_exported_functions__for_Lua___5_4_"></a>Global exported functions (for Lua < 5.4) </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "warn"></a>
+    <strong>warn (...)</strong>
+    </dt>
+    <dd>
+    raise a warning message.
+ This functions mimics the <a href="../libraries/pl.compat.html#warn">warn</a> function added in Lua 5.4.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         any arguments
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.comprehension.html b/Data/Libraries/Penlight/docs/libraries/pl.comprehension.html
new file mode 100644
index 0000000..4c31b64
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.comprehension.html
@@ -0,0 +1,165 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><strong>pl.comprehension</strong></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.comprehension</code></h1>
+<p>List comprehensions implemented in Lua.</p>
+<p> See the <a href="http://lua-users.org/wiki/ListComprehensions">wiki page</a></p>
+
+
+<pre>
+<span class="keyword">local</span> C= <span class="global">require</span> <span class="string">'pl.comprehension'</span> . new()
+
+C (<span class="string">'x for x=1,10'</span>) ()
+==&gt; {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span>,<span class="number">8</span>,<span class="number">9</span>,<span class="number">10</span>}
+C <span class="string">'x^2 for x=1,4'</span> ()
+==&gt; {<span class="number">1</span>,<span class="number">4</span>,<span class="number">9</span>,<span class="number">16</span>}
+C <span class="string">'{x,x^2} for x=1,4'</span> ()
+==&gt; {{<span class="number">1</span>,<span class="number">1</span>},{<span class="number">2</span>,<span class="number">4</span>},{<span class="number">3</span>,<span class="number">9</span>},{<span class="number">4</span>,<span class="number">16</span>}}
+C <span class="string">'2*x for x'</span> {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+==&gt; {<span class="number">2</span>,<span class="number">4</span>,<span class="number">6</span>}
+dbl = C <span class="string">'2*x for x'</span>
+dbl {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+==&gt; {<span class="number">20</span>,<span class="number">40</span>,<span class="number">60</span>}
+C <span class="string">'x for x if x % 2 == 0'</span> {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>}
+==&gt; {<span class="number">2</span>,<span class="number">4</span>}
+C <span class="string">'{x,y} for x = 1,2 for y = 1,2'</span> ()
+==&gt; {{<span class="number">1</span>,<span class="number">1</span>},{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">2</span>,<span class="number">1</span>},{<span class="number">2</span>,<span class="number">2</span>}}
+C <span class="string">'{x,y} for x for y'</span> ({<span class="number">1</span>,<span class="number">2</span>},{<span class="number">10</span>,<span class="number">20</span>})
+==&gt; {{<span class="number">1</span>,<span class="number">10</span>},{<span class="number">1</span>,<span class="number">20</span>},{<span class="number">2</span>,<span class="number">10</span>},{<span class="number">2</span>,<span class="number">20</span>}}
+<span class="global">assert</span>(C <span class="string">'sum(x^2 for x)'</span> {<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>} == <span class="number">2</span>^<span class="number">2</span>+<span class="number">3</span>^<span class="number">2</span>+<span class="number">4</span>^<span class="number">2</span>)
+</pre>
+
+<p> (c) 2008 David Manura. Licensed under the same terms as Lua (MIT license).</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.luabalanced.html#">pl.luabalanced</a></p>
+
+<p> See <a href="../manual/07-functional.md.html#List_Comprehensions">the Guide</a></p>
+
+
+
+<br/>
+<br/>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.config.html b/Data/Libraries/Penlight/docs/libraries/pl.config.html
new file mode 100644
index 0000000..1ad8833
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.config.html
@@ -0,0 +1,259 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><strong>pl.config</strong></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.config</code></h1>
+<p>Reads configuration files into a Lua table.</p>
+<p>
+
+<p>  Understands INI files, classic Unix config files, and simple
+ delimited columns of values. See <a href="../manual/06-data.md.html#Reading_Configuration_Files">the Guide</a></p>
+
+
+<pre>
+# test.config
+# Read timeout <span class="keyword">in</span> seconds
+read.timeout=<span class="number">10</span>
+# Write timeout <span class="keyword">in</span> seconds
+write.timeout=<span class="number">5</span>
+#acceptable ports
+ports = <span class="number">1002</span>,<span class="number">1003</span>,<span class="number">1004</span>
+
+<span class="comment">-- readconfig.lua
+</span><span class="keyword">local</span> config = <span class="global">require</span> <span class="string">'config'</span>
+<span class="keyword">local</span> t = config.read <span class="string">'test.config'</span>
+<span class="global">print</span>(pretty.write(t))
+
+### output #####
+{
+  ports = {
+    <span class="number">1002</span>,
+    <span class="number">1003</span>,
+    <span class="number">1004</span>
+  },
+  write_timeout = <span class="number">5</span>,
+  read_timeout = <span class="number">10</span>
+}
+</pre>
+
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#lines">lines (file)</a></td>
+	<td class="summary">like io.lines(), but allows for lines to be continued with ''.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#read">read (file[, cnfg])</a></td>
+	<td class="summary">read a configuration file into a table</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "lines"></a>
+    <strong>lines (file)</strong>
+    </dt>
+    <dd>
+    like io.lines(), but allows for lines to be continued with ''.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+         a file-like object (anything where read() returns the next line) or a filename.
+ Defaults to stardard input.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        an iterator over the lines, or nil</li>
+        <li>
+        error 'not a file-like object' or 'file is nil'</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "read"></a>
+    <strong>read (file[, cnfg])</strong>
+    </dt>
+    <dd>
+    read a configuration file into a table
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+         either a file-like object or a string, which must be a filename
+        </li>
+        <li><span class="parameter">cnfg</span>
+            <span class="types"><span class="type">tab</span></span>
+
+<p> a configuration table that may contain these fields:</p>
+
+<ul>
+    <li><code>smart</code>  try to deduce what kind of config file we have (default false)</li>
+    <li><code>variabilize</code> make names into valid Lua identifiers (default true)</li>
+    <li><code>convert_numbers</code> try to convert values into numbers (default true)</li>
+    <li><code>trim_space</code> ensure that there is no starting or trailing whitespace with values (default true)</li>
+    <li><code>trim_quotes</code> remove quotes from strings (default false)</li>
+    <li><code>list_delim</code> delimiter to use when separating columns (default ',')</li>
+    <li><code>keysep</code> separator between key and value pairs (default '=')</li>
+</ul>
+
+
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a table containing items, or <code>nil</code></li>
+        <li>
+        error message (same as <a href="../libraries/pl.config.html#lines">config.lines</a></li>
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.data.html b/Data/Libraries/Penlight/docs/libraries/pl.data.html
new file mode 100644
index 0000000..736e82e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.data.html
@@ -0,0 +1,571 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><strong>pl.data</strong></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.data</code></h1>
+<p>Reading and querying simple tabular data.</p>
+<p>
+
+
+
+<pre>
+data.read <span class="string">'test.txt'</span>
+==&gt; {{<span class="number">10</span>,<span class="number">20</span>},{<span class="number">2</span>,<span class="number">5</span>},{<span class="number">40</span>,<span class="number">50</span>},fieldnames={<span class="string">'x'</span>,<span class="string">'y'</span>},delim=<span class="string">','</span>}
+</pre>
+
+<p> Provides a way of creating basic SQL-like queries.</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> d = data.read(<span class="string">'xyz.txt'</span>)
+<span class="keyword">local</span> q = d:<span class="global">select</span>(<span class="string">'x,y,z where x &gt; 3 and z &lt; 2 sort by y'</span>)
+<span class="keyword">for</span> x,y,z <span class="keyword">in</span> q <span class="keyword">do</span>
+    <span class="global">print</span>(x,y,z)
+<span class="keyword">end</span>
+</pre>
+
+<p> See <a href="../manual/06-data.md.html#Reading_Columnar_Data">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.array2d.html#">pl.array2d</a> (fallback methods)</p>
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#Data.column_by_name">Data.column_by_name (name)</a></td>
+	<td class="summary">return a particular column as a list of values (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.select">Data.select (condn)</a></td>
+	<td class="summary">return a query iterator on this data (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.select_row">Data.select_row (condn)</a></td>
+	<td class="summary">return a row iterator on this data (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.copy_select">Data.copy_select (condn)</a></td>
+	<td class="summary">return a new data object based on this query (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.column_names">Data.column_names ()</a></td>
+	<td class="summary">return the field names of this data object (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.write_row">Data.write_row (f)</a></td>
+	<td class="summary">write out a row (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Data.write">Data.write (f)</a></td>
+	<td class="summary">write data out to file (method).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#read">read (file, cnfg)</a></td>
+	<td class="summary">read a delimited file in a Lua table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#write">write (data, file[, fieldnames[, delim='\t']])</a></td>
+	<td class="summary">write 2D data to a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#new">new (d[, fieldnames])</a></td>
+	<td class="summary">create a new dataset from a table of rows.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#query">query (data, condn, context, return_row)</a></td>
+	<td class="summary">create a query iterator from a select string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#filter">filter (Q, infile, outfile, dont_fail)</a></td>
+	<td class="summary">Filter input using a query.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "Data.column_by_name"></a>
+    <strong>Data.column_by_name (name)</strong>
+    </dt>
+    <dd>
+    return a particular column as a list of values (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+         either name of column, or numerical index.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Data.select"></a>
+    <strong>Data.select (condn)</strong>
+    </dt>
+    <dd>
+    return a query iterator on this data (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">condn</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the query expression
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.data.html#query">data.query</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "Data.select_row"></a>
+    <strong>Data.select_row (condn)</strong>
+    </dt>
+    <dd>
+    return a row iterator on this data (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">condn</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the query expression
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Data.copy_select"></a>
+    <strong>Data.copy_select (condn)</strong>
+    </dt>
+    <dd>
+    return a new data object based on this query (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">condn</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the query expression
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Data.column_names"></a>
+    <strong>Data.column_names ()</strong>
+    </dt>
+    <dd>
+    return the field names of this data object (method).
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Data.write_row"></a>
+    <strong>Data.write_row (f)</strong>
+    </dt>
+    <dd>
+    write out a row (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         file-like object
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Data.write"></a>
+    <strong>Data.write (f)</strong>
+    </dt>
+    <dd>
+    write data out to file (method).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         file-like object
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "read"></a>
+    <strong>read (file, cnfg)</strong>
+    </dt>
+    <dd>
+    read a delimited file in a Lua table.
+ By default, attempts to treat first line as separated list of fieldnames.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+         a filename or a file-like object
+        </li>
+        <li><span class="parameter">cnfg</span> parsing options
+        <ul>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string pattern to split fields
+        </li>
+        <li><span class="parameter">fieldnames</span>
+            <span class="types"><span class="type">array</span></span>
+         (i.e. don't read from first line)
+        </li>
+        <li><span class="parameter">no_convert</span>
+            <span class="types"><span class="type">bool</span></span>
+         (default is to try conversion on first data line)
+        </li>
+        <li><span class="parameter">convert</span>
+            <span class="types"><span class="type">tab</span></span>
+         table of custom conversion functions with column keys
+        </li>
+        <li><span class="parameter">numfields</span>
+            <span class="types"><span class="type">int</span></span>
+         indices of columns known to be numbers
+        </li>
+        <li><span class="parameter">last_field_collect</span>
+            <span class="types"><span class="type">bool</span></span>
+         only split as many fields as fieldnames.
+        </li>
+        <li><span class="parameter">thousands_dot</span>
+            <span class="types"><span class="type">int</span></span>
+         thousands separator in Excel CSV is '.'
+        </li>
+        <li><span class="parameter">csv</span>
+            <span class="types"><span class="type">bool</span></span>
+         fields may be double-quoted and contain commas;
+ Also, empty fields are considered to be equivalent to zero.
+        </li>
+        </li></ul>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        <a href="../libraries/pl.data.html">data</a> object, or <code>nil</code></li>
+        <li>
+        error message. May be a file error, 'not a file-like object'
+ or a conversion error</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "write"></a>
+    <strong>write (data, file[, fieldnames[, delim='\t']])</strong>
+    </dt>
+    <dd>
+    write 2D data to a file.
+ Does not assume that the data has actually been
+ generated with <a href="../libraries/pl.data.html#new">new</a> or <a href="../libraries/pl.data.html#read">read</a>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">data</span>
+         2D array
+        </li>
+        <li><span class="parameter">file</span>
+         filename or file-like object
+        </li>
+        <li><span class="parameter">fieldnames</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+         list of fields (optional)
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         delimiter (default tab)
+         (<em>default</em> '\t')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or nil, error
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "new"></a>
+    <strong>new (d[, fieldnames])</strong>
+    </dt>
+    <dd>
+    create a new dataset from a table of rows.
+ Can specify the fieldnames, else the table must have a field called
+ 'fieldnames', which is either a string of delimiter-separated names,
+ or a table of names. <br>
+ If the table does not have a field called 'delim', then an attempt will be
+ made to guess it from the fieldnames string, defaults otherwise to tab.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">d</span>
+         the table.
+        </li>
+        <li><span class="parameter">fieldnames</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+         optional fieldnames
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the table.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "query"></a>
+    <strong>query (data, condn, context, return_row)</strong>
+    </dt>
+    <dd>
+    create a query iterator from a select string.
+ Select string has this format: <br>
+ FIELDLIST [ where LUA-CONDN [ sort by FIELD] ]<br>
+ FIELDLIST is a comma-separated list of valid fields, or '*'. <br> <br>
+ The condition can also be a table, with fields 'fields' (comma-sep string or
+ table), 'sort_by' (string) and 'where' (Lua expression string or function)
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">data</span>
+         table produced by read
+        </li>
+        <li><span class="parameter">condn</span>
+         select string or table
+        </li>
+        <li><span class="parameter">context</span>
+         a list of tables to be searched when resolving functions
+        </li>
+        <li><span class="parameter">return_row</span>
+         if true, wrap the results in a row table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        an iterator over the specified fields, or nil</li>
+        <li>
+        an error message</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "filter"></a>
+    <strong>filter (Q, infile, outfile, dont_fail)</strong>
+    </dt>
+    <dd>
+    Filter input using a query.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">Q</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a query string
+        </li>
+        <li><span class="parameter">infile</span>
+         filename or file-like object
+        </li>
+        <li><span class="parameter">outfile</span>
+         filename or file-like object
+        </li>
+        <li><span class="parameter">dont_fail</span>
+            <span class="types"><span class="type">bool</span></span>
+         true if you want to return an error, not just fail
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.dir.html b/Data/Libraries/Penlight/docs/libraries/pl.dir.html
new file mode 100644
index 0000000..5dfa0f6
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.dir.html
@@ -0,0 +1,615 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><strong>pl.dir</strong></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.dir</code></h1>
+<p>Listing files in directories and creating/removing directory paths.</p>
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.path.html#">pl.path</a></p>
+
+<p> Soft Dependencies: <code>alien</code>, <code>ffi</code> (either are used on Windows for copying/moving files)</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#fnmatch">fnmatch (filename, pattern)</a></td>
+	<td class="summary">Test whether a file name matches a shell pattern.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#filter">filter (filenames, pattern)</a></td>
+	<td class="summary">Return a list of all file names within an array which match a pattern.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getfiles">getfiles (dirname, mask)</a></td>
+	<td class="summary">return a list of all files in a directory which match a shell pattern.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getdirectories">getdirectories (dirname)</a></td>
+	<td class="summary">return a list of all subdirectories of the directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copyfile">copyfile (src, dest, flag)</a></td>
+	<td class="summary">copy a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#movefile">movefile (src, dest)</a></td>
+	<td class="summary">move a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#walk">walk (root, bottom_up, follow_links)</a></td>
+	<td class="summary">return an iterator which walks through a directory tree starting at root.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rmtree">rmtree (fullpath)</a></td>
+	<td class="summary">remove a whole directory tree.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#makepath">makepath (p)</a></td>
+	<td class="summary">create a directory path.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#clonetree">clonetree (path1, path2, file_fun, verbose)</a></td>
+	<td class="summary">clone a directory tree.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dirtree">dirtree (d)</a></td>
+	<td class="summary">return an iterator over all entries in a directory tree</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getallfiles">getallfiles (start_path, shell_pattern)</a></td>
+	<td class="summary">Recursively returns all the file starting at <em>path</em>.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "fnmatch"></a>
+    <strong>fnmatch (filename, pattern)</strong>
+    </dt>
+    <dd>
+    Test whether a file name matches a shell pattern.
+ Both parameters are case-normalized if operating system is
+ case-insensitive.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">filename</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file name.
+        </li>
+        <li><span class="parameter">pattern</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A shell pattern. The only special characters are
+ <code>&apos;*&apos;</code> and <code>&apos;?&apos;</code>: <code>&apos;*&apos;</code> matches any sequence of characters and
+ <code>&apos;?&apos;</code> matches any single character.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><span class="type">bool</span></span>
+
+
+
+    </ol>
+
+    <h3>Raises:</h3>
+    dir and mask must be strings
+
+
+
+</dd>
+    <dt>
+    <a name = "filter"></a>
+    <strong>filter (filenames, pattern)</strong>
+    </dt>
+    <dd>
+    Return a list of all file names within an array which match a pattern.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">filenames</span>
+            <span class="types"><span class="type">tab</span></span>
+         An array containing file names.
+        </li>
+        <li><span class="parameter">pattern</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A shell pattern.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="../classes/pl.List.html">List(string)</a></span>
+        List of matching file names.
+    </ol>
+
+    <h3>Raises:</h3>
+    dir and mask must be strings
+
+
+
+</dd>
+    <dt>
+    <a name = "getfiles"></a>
+    <strong>getfiles (dirname, mask)</strong>
+    </dt>
+    <dd>
+    return a list of all files in a directory which match a shell pattern.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">dirname</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A directory. If not given, all files in current directory are returned.
+        </li>
+        <li><span class="parameter">mask</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+          A shell pattern. If not given, all files are returned.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+        list of files
+    </ol>
+
+    <h3>Raises:</h3>
+    dirname and mask must be strings
+
+
+
+</dd>
+    <dt>
+    <a name = "getdirectories"></a>
+    <strong>getdirectories (dirname)</strong>
+    </dt>
+    <dd>
+    return a list of all subdirectories of the directory.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">dirname</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A directory
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+        a list of directories
+    </ol>
+
+    <h3>Raises:</h3>
+    dir must be a a valid directory
+
+
+
+</dd>
+    <dt>
+    <a name = "copyfile"></a>
+    <strong>copyfile (src, dest, flag)</strong>
+    </dt>
+    <dd>
+    copy a file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">src</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         source file
+        </li>
+        <li><span class="parameter">dest</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         destination file or directory
+        </li>
+        <li><span class="parameter">flag</span>
+            <span class="types"><span class="type">bool</span></span>
+         true if you want to force the copy (default)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><span class="type">bool</span></span>
+        operation succeeded
+    </ol>
+
+    <h3>Raises:</h3>
+    src and dest must be strings
+
+
+
+</dd>
+    <dt>
+    <a name = "movefile"></a>
+    <strong>movefile (src, dest)</strong>
+    </dt>
+    <dd>
+    move a file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">src</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         source file
+        </li>
+        <li><span class="parameter">dest</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         destination file or directory
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><span class="type">bool</span></span>
+        operation succeeded
+    </ol>
+
+    <h3>Raises:</h3>
+    src and dest must be strings
+
+
+
+</dd>
+    <dt>
+    <a name = "walk"></a>
+    <strong>walk (root, bottom_up, follow_links)</strong>
+    </dt>
+    <dd>
+    return an iterator which walks through a directory tree starting at root.
+ The iterator returns (root,dirs,files)
+ Note that dirs and files are lists of names (i.e. you must say path.join(root,d)
+ to get the actual full path)
+ If bottom_up is false (or not present), then the entries at the current level are returned
+ before we go deeper. This means that you can modify the returned list of directories before
+ continuing.
+ This is a clone of os.walk from the Python libraries.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">root</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A starting directory
+        </li>
+        <li><span class="parameter">bottom_up</span>
+            <span class="types"><span class="type">bool</span></span>
+         False if we start listing entries immediately.
+        </li>
+        <li><span class="parameter">follow_links</span>
+            <span class="types"><span class="type">bool</span></span>
+         follow symbolic links
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator returning root,dirs,files
+    </ol>
+
+    <h3>Raises:</h3>
+    root must be a directory
+
+
+
+</dd>
+    <dt>
+    <a name = "rmtree"></a>
+    <strong>rmtree (fullpath)</strong>
+    </dt>
+    <dd>
+    remove a whole directory tree.
+ Symlinks in the tree will be deleted without following them.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fullpath</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A directory path (must be an actual directory, not a symlink)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        true or nil</li>
+        <li>
+        error if failed</li>
+    </ol>
+
+    <h3>Raises:</h3>
+    fullpath must be a string
+
+
+
+</dd>
+    <dt>
+    <a name = "makepath"></a>
+    <strong>makepath (p)</strong>
+    </dt>
+    <dd>
+    create a directory path.
+ This will create subdirectories as necessary!
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">p</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A directory path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true on success, nil + errormsg on failure
+    </ol>
+
+    <h3>Raises:</h3>
+    failure to create
+
+
+
+</dd>
+    <dt>
+    <a name = "clonetree"></a>
+    <strong>clonetree (path1, path2, file_fun, verbose)</strong>
+    </dt>
+    <dd>
+    clone a directory tree.  Will always try to create a new directory structure
+ if necessary.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">path1</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the base path of the source tree
+        </li>
+        <li><span class="parameter">path2</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the new base path for the destination
+        </li>
+        <li><span class="parameter">file_fun</span>
+            <span class="types"><span class="type">func</span></span>
+         an optional function to apply on all files
+        </li>
+        <li><span class="parameter">verbose</span>
+            <span class="types"><span class="type">bool</span></span>
+         an optional boolean to control the verbosity of the output.
+  It can also be a logging function that behaves like print()
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        true, or nil</li>
+        <li>
+        error message, or list of failed directory creations</li>
+        <li>
+        list of failed file operations</li>
+    </ol>
+
+    <h3>Raises:</h3>
+    path1 and path2 must be strings
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">clonetree(<span class="string">'.'</span>,<span class="string">'../backup'</span>,copyfile)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "dirtree"></a>
+    <strong>dirtree (d)</strong>
+    </dt>
+    <dd>
+    return an iterator over all entries in a directory tree
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">d</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a directory
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator giving pathname and mode (true for dir, false otherwise)
+    </ol>
+
+    <h3>Raises:</h3>
+    d must be a non-empty string
+
+
+
+</dd>
+    <dt>
+    <a name = "getallfiles"></a>
+    <strong>getallfiles (start_path, shell_pattern)</strong>
+    </dt>
+    <dd>
+    Recursively returns all the file starting at <em>path</em>.  It can optionally take a shell pattern and
+ only returns files that match <em>shell</em>pattern_. If a pattern is given it will do a case insensitive search.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">start_path</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+          A directory. If not given, all files in current directory are returned.
+        </li>
+        <li><span class="parameter">shell_pattern</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A shell pattern. If not given, all files are returned.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="../classes/pl.List.html">List(string)</a></span>
+        containing all the files found recursively starting at <em>path</em> and filtered by <em>shell</em>pattern_.
+    </ol>
+
+    <h3>Raises:</h3>
+    start_path must be a directory
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.file.html b/Data/Libraries/Penlight/docs/libraries/pl.file.html
new file mode 100644
index 0000000..bd36aca
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.file.html
@@ -0,0 +1,301 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><strong>pl.file</strong></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.file</code></h1>
+<p>File manipulation functions: reading, writing, moving and copying.</p>
+<p> This module wraps a number of functions from other modules into a
+ file related module for convenience.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.dir.html#">pl.dir</a>, <a href="../libraries/pl.path.html#">pl.path</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#read">read ()</a></td>
+	<td class="summary">return the contents of a file as a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#write">write ()</a></td>
+	<td class="summary">write a string to a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copy">copy ()</a></td>
+	<td class="summary">copy a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#move">move ()</a></td>
+	<td class="summary">move a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#access_time">access_time ()</a></td>
+	<td class="summary">Return the time of last access as the number of seconds since the epoch.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#creation_time">creation_time ()</a></td>
+	<td class="summary">Return when the file was created.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#modified_time">modified_time ()</a></td>
+	<td class="summary">Return the time of last modification.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#delete">delete ()</a></td>
+	<td class="summary">Delete a file.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "read"></a>
+    <strong>read ()</strong>
+    </dt>
+    <dd>
+    return the contents of a file as a string.
+ This function is a copy of <a href="../libraries/pl.utils.html#readfile">utils.readfile</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "write"></a>
+    <strong>write ()</strong>
+    </dt>
+    <dd>
+    write a string to a file.
+ This function is a copy of <a href="../libraries/pl.utils.html#writefile">utils.writefile</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "copy"></a>
+    <strong>copy ()</strong>
+    </dt>
+    <dd>
+    copy a file.
+ This function is a copy of <a href="../libraries/pl.dir.html#copyfile">dir.copyfile</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "move"></a>
+    <strong>move ()</strong>
+    </dt>
+    <dd>
+    move a file.
+ This function is a copy of <a href="../libraries/pl.dir.html#movefile">dir.movefile</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "access_time"></a>
+    <strong>access_time ()</strong>
+    </dt>
+    <dd>
+    Return the time of last access as the number of seconds since the epoch.
+ This function is a copy of <a href="../libraries/pl.path.html#getatime">path.getatime</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "creation_time"></a>
+    <strong>creation_time ()</strong>
+    </dt>
+    <dd>
+    Return when the file was created.
+ This function is a copy of <a href="../libraries/pl.path.html#getctime">path.getctime</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "modified_time"></a>
+    <strong>modified_time ()</strong>
+    </dt>
+    <dd>
+    Return the time of last modification.
+ This function is a copy of <a href="../libraries/pl.path.html#getmtime">path.getmtime</a>.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "delete"></a>
+    <strong>delete ()</strong>
+    </dt>
+    <dd>
+    Delete a file.
+ This function is a copy of <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.remove">os.remove</a>.
+
+
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.func.html b/Data/Libraries/Penlight/docs/libraries/pl.func.html
new file mode 100644
index 0000000..22e84a1
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.func.html
@@ -0,0 +1,460 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><strong>pl.func</strong></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.func</code></h1>
+<p>Functional helpers like composition, binding and placeholder expressions.</p>
+<p> Placeholder expressions are useful for short anonymous functions, and were
+ inspired by the Boost Lambda library.</p>
+
+
+<pre>
+&gt; utils.import <span class="string">'pl.func'</span>
+&gt; ls = List{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+&gt; = ls:map(_1+<span class="number">1</span>)
+{<span class="number">11</span>,<span class="number">21</span>,<span class="number">31</span>}
+</pre>
+
+<p> They can also be used to <em>bind</em> particular arguments of a function.</p>
+
+
+<pre>
+&gt; p = bind(<span class="global">print</span>,<span class="string">'start&gt;'</span>,_0)
+&gt; p(<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>)
+&gt; start&gt;   <span class="number">10</span>   <span class="number">20</span>  <span class="number">30</span>
+</pre>
+
+<p> See <a href="../manual/07-functional.md.html#Creating_Functions_from_Functions">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#import">import (tname, context)</a></td>
+	<td class="summary">wrap a table of functions.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#register">register (fun[, name])</a></td>
+	<td class="summary">register a function for use in placeholder expressions.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#tail">tail (ls)</a></td>
+	<td class="summary">all elements of a table except the first.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#repr">repr (e, lastpred)</a></td>
+	<td class="summary">create a string representation of a placeholder expression.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#instantiate">instantiate (e)</a></td>
+	<td class="summary">instantiate a PE into an actual function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#I">I (e)</a></td>
+	<td class="summary">instantiate a PE unless it has already been done.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#bind1">bind1 (fn, p)</a></td>
+	<td class="summary">bind the first parameter of the function to a value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compose">compose (f, g)</a></td>
+	<td class="summary">create a function which chains two functions.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#bind">bind (fn, ...)</a></td>
+	<td class="summary">bind the arguments of a function to given values.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "import"></a>
+    <strong>import (tname, context)</strong>
+    </dt>
+    <dd>
+    wrap a table of functions.  This makes them available for use in
+ placeholder expressions.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tname</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a table name
+        </li>
+        <li><span class="parameter">context</span>
+            <span class="types"><span class="type">tab</span></span>
+         context to put results, defaults to environment of caller
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "register"></a>
+    <strong>register (fun[, name])</strong>
+    </dt>
+    <dd>
+    register a function for use in placeholder expressions.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function
+        </li>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         an optional name
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a placeholder functiond
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "tail"></a>
+    <strong>tail (ls)</strong>
+    </dt>
+    <dd>
+    all elements of a table except the first.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">ls</span>
+            <span class="types"><span class="type">tab</span></span>
+         a list-like table.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "repr"></a>
+    <strong>repr (e, lastpred)</strong>
+    </dt>
+    <dd>
+    create a string representation of a placeholder expression.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">e</span>
+         a placeholder expression
+        </li>
+        <li><span class="parameter">lastpred</span>
+         not used
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "instantiate"></a>
+    <strong>instantiate (e)</strong>
+    </dt>
+    <dd>
+    instantiate a PE into an actual function.  First we find the largest placeholder used,
+ e.g. <em>2; from this a list of the formal parameters can be build. Then we collect and replace
+ any non-PE values from the PE, and build up a constant binding list.
+ Finally, the expression can be compiled, and e.</em><em>PE</em>function is set.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">e</span>
+         a placeholder expression
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "I"></a>
+    <strong>I (e)</strong>
+    </dt>
+    <dd>
+    instantiate a PE unless it has already been done.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">e</span>
+         a placeholder expression
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the function
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "bind1"></a>
+    <strong>bind1 (fn, p)</strong>
+    </dt>
+    <dd>
+    bind the first parameter of the function to a value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of one or more arguments
+        </li>
+        <li><span class="parameter">p</span>
+         a value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function of one less argument
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">(bind1(<span class="global">math</span>.max,<span class="number">10</span>))(<span class="number">20</span>) == <span class="global">math</span>.max(<span class="number">10</span>,<span class="number">20</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "compose"></a>
+    <strong>compose (f, g)</strong>
+    </dt>
+    <dd>
+    create a function which chains two functions.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+        <li><span class="parameter">g</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">printf = compose(<span class="global">io</span>.write,<span class="global">string</span>.format)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "bind"></a>
+    <strong>bind (fn, ...)</strong>
+    </dt>
+    <dd>
+    bind the arguments of a function to given values.
+ <code>bind(fn,v,_2)</code> is equivalent to <code>bind1(fn,v)</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least one argument
+        </li>
+        <li><span class="parameter">...</span>
+         values or placeholder variables
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">(bind(f,_1,a))(b) == f(a,b)</pre></li>
+        <li><pre class="example">(bind(f,_2,_1))(a,b) == f(b,a)</pre></li>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.html b/Data/Libraries/Penlight/docs/libraries/pl.html
new file mode 100644
index 0000000..f3d134f
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.html
@@ -0,0 +1,139 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><strong>pl</strong></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl</code></h1>
+<p>Entry point for loading all PL libraries only on demand, into the global space.</p>
+<p> Requiring 'pl' means that whenever a module is implicitly accesssed
+ (e.g. <a href="../libraries/pl.utils.html#split">utils.split</a>)
+ then that module is dynamically loaded. The submodules are all brought into
+ the global space.
+Updated to use <a href="../libraries/pl.import_into.html#">pl.import_into</a></p>
+
+
+
+<br/>
+<br/>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.import_into.html b/Data/Libraries/Penlight/docs/libraries/pl.import_into.html
new file mode 100644
index 0000000..5f92459
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.import_into.html
@@ -0,0 +1,142 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><strong>pl.import_into</strong></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.import_into</code></h1>
+<p>PL loader, for loading all PL libraries, only on demand.</p>
+<p> Whenever a module is implicitly accesssed, the table will have the module automatically injected.
+ (e.g. <code>_ENV.tablex</code>)
+ then that module is dynamically loaded. The submodules are all brought into
+ the table that is provided as the argument, or returned in a new table.
+ If a table is provided, that table's metatable is clobbered, but the values are not.
+ This module returns a single function, which is passed the environment.
+ If this is <code>true</code>, then return a 'shadow table' as the module
+ See <a href="../manual/01-introduction.md.html#To_Inject_or_not_to_Inject_">the Guide</a></p>
+
+
+
+<br/>
+<br/>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.input.html b/Data/Libraries/Penlight/docs/libraries/pl.input.html
new file mode 100644
index 0000000..d0086fd
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.input.html
@@ -0,0 +1,336 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><strong>pl.input</strong></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.input</code></h1>
+<p>Iterators for extracting words or numbers from an input source.</p>
+<p>
+
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> total,n = seq.sum(input.numbers())
+<span class="global">print</span>(<span class="string">'average'</span>,total/n)
+</pre>
+
+<p> <em>source</em> is defined as a string or a file-like object (i.e. has a read() method which returns the next line)</p>
+
+<p> See <a href="../manual/06-data.md.html#Reading_Unstructured_Text_Data">here</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a></p>
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#alltokens">alltokens (getter, pattern[, fn])</a></td>
+	<td class="summary">create an iterator over all tokens.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#create_getter">create_getter (f)</a></td>
+	<td class="summary">create a function which grabs the next value from a source.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#numbers">numbers (f)</a></td>
+	<td class="summary">generate a sequence of numbers from a source.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#words">words (f)</a></td>
+	<td class="summary">generate a sequence of words from a source.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#fields">fields (ids, delim, f, opts)</a></td>
+	<td class="summary">parse an input source into fields.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "alltokens"></a>
+    <strong>alltokens (getter, pattern[, fn])</strong>
+    </dt>
+    <dd>
+    create an iterator over all tokens.
+ based on allwords from PiL, 7.1
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">getter</span>
+            <span class="types"><span class="type">func</span></span>
+         any function that returns a line of text
+        </li>
+        <li><span class="parameter">pattern</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+
+
+
+        </li>
+        <li><span class="parameter">fn</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+          Optionally can pass a function to process each token as it's found.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "create_getter"></a>
+    <strong>create_getter (f)</strong>
+    </dt>
+    <dd>
+    create a function which grabs the next value from a source.  If the source is a string, then the getter
+ will return the string and thereafter return nil. If not specified then the source is assumed to be stdin.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         a string or a file-like object (i.e. has a read() method which returns the next line)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a getter function
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "numbers"></a>
+    <strong>numbers (f)</strong>
+    </dt>
+    <dd>
+    generate a sequence of numbers from a source.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         A source
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        An iterator
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "words"></a>
+    <strong>words (f)</strong>
+    </dt>
+    <dd>
+    generate a sequence of words from a source.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         A source
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        An iterator
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "fields"></a>
+    <strong>fields (ids, delim, f, opts)</strong>
+    </dt>
+    <dd>
+    parse an input source into fields.
+ By default, will fail if it cannot convert a field to a number.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">ids</span>
+         a list of field indices, or a maximum field index
+        </li>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         delimiter to parse fields (default space)
+        </li>
+        <li><span class="parameter">f</span>
+         a source @see create_getter
+        </li>
+        <li><span class="parameter">opts</span>
+            <span class="types"><span class="type">tab</span></span>
+         option table, <code>{no_fail=true}</code>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator with the field values
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">for</span> x,y <span class="keyword">in</span> fields {<span class="number">2</span>,<span class="number">3</span>} <span class="keyword">do</span> <span class="global">print</span>(x,y) <span class="keyword">end</span> <span class="comment">-- 2nd and 3rd fields from stdin</span></pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.lapp.html b/Data/Libraries/Penlight/docs/libraries/pl.lapp.html
new file mode 100644
index 0000000..24a1079
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.lapp.html
@@ -0,0 +1,382 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Fields">Fields</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><strong>pl.lapp</strong></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.lapp</code></h1>
+<p>Simple command-line parsing using human-readable specification.</p>
+<p> Supports GNU-style parameters.</p>
+
+
+<pre>
+lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+<span class="keyword">local</span> args = lapp <span class="string">[[
+Does some calculations
+  -o,--offset (default 0.0)  Offset to add to scaled number
+  -s,--scale  (number)  Scaling factor
+  &lt;number&gt; (number) Number to be scaled
+]]</span>
+
+<span class="global">print</span>(args.offset + args.scale * args.number)
+</pre>
+
+<p> Lines beginning with <code>&apos;-&apos;</code> are flags; there may be a short and a long name;
+ lines beginning with <code>&apos;&lt;var&gt;&apos;</code> are arguments.  Anything in parens after
+ the flag/argument is either a default, a type name or a range constraint.</p>
+
+<p> See <a href="../manual/08-additional.md.html#Command_line_Programs_with_Lapp">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.sip.html#">pl.sip</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#quit">quit (msg, no_usage)</a></td>
+	<td class="summary">quit this script immediately.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#error">error (msg, no_usage)</a></td>
+	<td class="summary">print an error to stderr and quit.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#open">open (file[, opt])</a></td>
+	<td class="summary">open a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#assert">assert (condn, msg)</a></td>
+	<td class="summary">quit if the condition is false.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#add_type">add_type (name, converter[, constraint])</a></td>
+	<td class="summary">add a new type to Lapp.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#process_options_string">process_options_string (str, args)</a></td>
+	<td class="summary">process a Lapp options string.</td>
+	</tr>
+</table>
+<h2><a href="#Fields">Fields</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#show_usage_error">show_usage_error</a></td>
+	<td class="summary">controls whether to dump usage on error.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "quit"></a>
+    <strong>quit (msg, no_usage)</strong>
+    </dt>
+    <dd>
+    quit this script immediately.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">msg</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         optional message
+        </li>
+        <li><span class="parameter">no_usage</span>
+            <span class="types"><span class="type">bool</span></span>
+         suppress 'usage' display
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "error"></a>
+    <strong>error (msg, no_usage)</strong>
+    </dt>
+    <dd>
+    print an error to stderr and quit.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">msg</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a message
+        </li>
+        <li><span class="parameter">no_usage</span>
+            <span class="types"><span class="type">bool</span></span>
+         suppress 'usage' display
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "open"></a>
+    <strong>open (file[, opt])</strong>
+    </dt>
+    <dd>
+    open a file.
+ This will quit on error, and keep a list of file objects for later cleanup.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         filename
+        </li>
+        <li><span class="parameter">opt</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         same as second parameter of <a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.open">io.open</a>
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "assert"></a>
+    <strong>assert (condn, msg)</strong>
+    </dt>
+    <dd>
+    quit if the condition is false.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">condn</span>
+            <span class="types"><span class="type">bool</span></span>
+         a condition
+        </li>
+        <li><span class="parameter">msg</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         message text
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "add_type"></a>
+    <strong>add_type (name, converter[, constraint])</strong>
+    </dt>
+    <dd>
+    add a new type to Lapp.  These appear in parens after the value like
+ a range constraint, e.g. '<ival> (integer) Process PID'
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         name of type
+        </li>
+        <li><span class="parameter">converter</span>
+         either a function to convert values, or a Lua type name.
+        </li>
+        <li><span class="parameter">constraint</span>
+            <span class="types"><span class="type">func</span></span>
+         optional function to verify values, should use lapp.error
+ if failed.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "process_options_string"></a>
+    <strong>process_options_string (str, args)</strong>
+    </dt>
+    <dd>
+    process a Lapp options string.
+ Usually called as <code>lapp()</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">str</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the options text
+        </li>
+        <li><span class="parameter">args</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">{string}</a></span>
+         a table of arguments (default is <code>_G.arg</code>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table with parameter-value pairs
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Fields"></a>Fields</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "show_usage_error"></a>
+    <strong>show_usage_error</strong>
+    </dt>
+    <dd>
+    controls whether to dump usage on error.
+ Defaults to true
+
+
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.lexer.html b/Data/Libraries/Penlight/docs/libraries/pl.lexer.html
new file mode 100644
index 0000000..7b3d6fd
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.lexer.html
@@ -0,0 +1,524 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><strong>pl.lexer</strong></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.lexer</code></h1>
+<p>Lexical scanner for creating a sequence of tokens from text.</p>
+<p> <code>lexer.scan(s)</code> returns an iterator over all tokens found in the
+ string <code>s</code>. This iterator returns two values, a token type string
+ (such as 'string' for quoted string, 'iden' for identifier) and the value of the
+ token.</p>
+
+<p> Versions specialized for Lua and C are available; these also handle block comments
+ and classify keywords as 'keyword' tokens. For example:</p>
+
+
+<pre>
+&gt; s = <span class="string">'for i=1,n do'</span>
+&gt; <span class="keyword">for</span> t,v <span class="keyword">in</span> lexer.lua(s)  <span class="keyword">do</span> <span class="global">print</span>(t,v) <span class="keyword">end</span>
+keyword <span class="keyword">for</span>
+iden    i
+=       =
+number  <span class="number">1</span>
+,       ,
+iden    n
+keyword <span class="keyword">do</span>
+</pre>
+
+<p> See the Guide for further <a href="../manual/06-data.md.html#Lexical_Scanning">discussion</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#scan">scan (s, matches[, filter[, options]])</a></td>
+	<td class="summary">create a plain token iterator from a string or file-like object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#insert">insert (tok, a1, a2)</a></td>
+	<td class="summary">insert tokens into a stream.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getline">getline (tok)</a></td>
+	<td class="summary">get everything in a stream upto a newline.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lineno">lineno (tok)</a></td>
+	<td class="summary">get current line number.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getrest">getrest (tok)</a></td>
+	<td class="summary">get the rest of the stream.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#get_keywords">get_keywords ()</a></td>
+	<td class="summary">get the Lua keywords as a set-like table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lua">lua (s[, filter[, options]])</a></td>
+	<td class="summary">create a Lua token iterator from a string or file-like object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#cpp">cpp (s[, filter[, options]])</a></td>
+	<td class="summary">create a C/C++ token iterator from a string or file-like object.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#get_separated_list">get_separated_list (tok[, endtoken=')'[, delim=']])</a></td>
+	<td class="summary">get a list of parameters separated by a delimiter from a stream.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#skipws">skipws (tok)</a></td>
+	<td class="summary">get the next non-space token from the stream.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#expecting">expecting (tok, expected_type, no_skip_ws)</a></td>
+	<td class="summary">get the next token, which must be of the expected type.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "scan"></a>
+    <strong>scan (s, matches[, filter[, options]])</strong>
+    </dt>
+    <dd>
+    create a plain token iterator from a string or file-like object.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a> or <span class="type">file</span></span>
+         a string or a file-like object with <code>:read()</code> method returning lines.
+        </li>
+        <li><span class="parameter">matches</span>
+            <span class="types"><span class="type">tab</span></span>
+         an optional match table - array of token descriptions.
+ A token is described by a <code>{pattern, action}</code> pair, where <code>pattern</code> should match
+ token body and <code>action</code> is a function called when a token of described type is found.
+        </li>
+        <li><span class="parameter">filter</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of token types to exclude, by default <code>{space=true}</code>
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">options</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of options; by default, <code>{number=true,string=true}</code>,
+ which means convert numbers and strip string quotes.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "insert"></a>
+    <strong>insert (tok, a1, a2)</strong>
+    </dt>
+    <dd>
+    insert tokens into a stream.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         a token stream
+        </li>
+        <li><span class="parameter">a1</span>
+         a string is the type, a table is a token list and
+ a function is assumed to be a token-like iterator (returns type &amp; value)
+        </li>
+        <li><span class="parameter">a2</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string is the value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getline"></a>
+    <strong>getline (tok)</strong>
+    </dt>
+    <dd>
+    get everything in a stream upto a newline.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         a token stream
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lineno"></a>
+    <strong>lineno (tok)</strong>
+    </dt>
+    <dd>
+    get current line number.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         a token stream
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+         the line number.
+ if the input source is a file-like object,
+ also return the column.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getrest"></a>
+    <strong>getrest (tok)</strong>
+    </dt>
+    <dd>
+    get the rest of the stream.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         a token stream
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "get_keywords"></a>
+    <strong>get_keywords ()</strong>
+    </dt>
+    <dd>
+    get the Lua keywords as a set-like table.
+ So <code>res[&quot;and&quot;]</code> etc would be <code>true</code>.
+
+
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lua"></a>
+    <strong>lua (s[, filter[, options]])</strong>
+    </dt>
+    <dd>
+    create a Lua token iterator from a string or file-like object.
+ Will return the token type and value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">filter</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of token types to exclude, by default <code>{space=true,comments=true}</code>
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">options</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of options; by default, <code>{number=true,string=true}</code>,
+ which means convert numbers and strip string quotes.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "cpp"></a>
+    <strong>cpp (s[, filter[, options]])</strong>
+    </dt>
+    <dd>
+    create a C/C++ token iterator from a string or file-like object.
+ Will return the token type type and value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">filter</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of token types to exclude, by default <code>{space=true,comments=true}</code>
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">options</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table of options; by default, <code>{number=true,string=true}</code>,
+ which means convert numbers and strip string quotes.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "get_separated_list"></a>
+    <strong>get_separated_list (tok[, endtoken=')'[, delim=']])</strong>
+    </dt>
+    <dd>
+    get a list of parameters separated by a delimiter from a stream.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         the token stream
+        </li>
+        <li><span class="parameter">endtoken</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         end of list. Can be '\n'
+         (<em>default</em> ')')
+        </li>
+        <li><span class="parameter">delim</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         separator
+         (<em>default</em> ')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list of token lists.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "skipws"></a>
+    <strong>skipws (tok)</strong>
+    </dt>
+    <dd>
+    get the next non-space token from the stream.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         the token stream.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "expecting"></a>
+    <strong>expecting (tok, expected_type, no_skip_ws)</strong>
+    </dt>
+    <dd>
+    get the next token, which must be of the expected type.
+ Throws an error if this type does not match!
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tok</span>
+         the token stream
+        </li>
+        <li><span class="parameter">expected_type</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the token type
+        </li>
+        <li><span class="parameter">no_skip_ws</span>
+            <span class="types"><span class="type">bool</span></span>
+         whether we should skip whitespace
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.luabalanced.html b/Data/Libraries/Penlight/docs/libraries/pl.luabalanced.html
new file mode 100644
index 0000000..48f6c63
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.luabalanced.html
@@ -0,0 +1,149 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><strong>pl.luabalanced</strong></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.luabalanced</code></h1>
+<p>Extract delimited Lua sequences from strings.</p>
+<p> Inspired by Damian Conway's Text::Balanced in Perl. <br/>
+ <ul>
+   <li>[1] <a href="http://lua-users.org/wiki/LuaBalanced">Lua Wiki Page</a></li>
+   <li>[2] http://search.cpan.org/dist/Text-Balanced/lib/Text/Balanced.pm</li>
+ </ul> <br/>
+ <pre class=example>
+ local lb = require "pl.luabalanced"
+ --Extract Lua expression starting at position 4.
+  print(lb.match_expression("if x^2 + x > 5 then print(x) end", 4))
+  --> x^2 + x > 5     16
+ --Extract Lua string starting at (default) position 1.
+ print(lb.match_string([["test\"123" .. "more"]]))
+ --> "test\"123"     12
+ </pre>
+ (c) 2008, David Manura, Licensed under the same terms as Lua (MIT license).</p>
+
+
+
+<br/>
+<br/>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.operator.html b/Data/Libraries/Penlight/docs/libraries/pl.operator.html
new file mode 100644
index 0000000..fdd4cfb
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.operator.html
@@ -0,0 +1,819 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Tables">Tables</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><strong>pl.operator</strong></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.operator</code></h1>
+<p>Lua operators available as functions.</p>
+<p> (similar to the Python module of the same name)</p>
+
+<p> There is a module field <a href="../libraries/pl.operator.html#optable">optable</a> which maps the operator strings
+ onto these functions, e.g. <code>operator.optable[&apos;()&apos;]==operator.call</code></p>
+
+<p> Operator strings like '>' and '{}' can be passed to most Penlight functions
+ expecting a function argument.</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#call">call (fn, ...)</a></td>
+	<td class="summary">apply function to some arguments <strong>()</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#index">index (t, k)</a></td>
+	<td class="summary">get the indexed value from a table <strong>[]</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#eq">eq (a, b)</a></td>
+	<td class="summary">returns true if arguments are equal <strong>==</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#neq">neq (a, b)</a></td>
+	<td class="summary">returns true if arguments are not equal <strong>~=</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lt">lt (a, b)</a></td>
+	<td class="summary">returns true if a is less than b <strong>&lt;</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#le">le (a, b)</a></td>
+	<td class="summary">returns true if a is less or equal to b <strong>&lt;=</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#gt">gt (a, b)</a></td>
+	<td class="summary">returns true if a is greater than b <strong>></strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#ge">ge (a, b)</a></td>
+	<td class="summary">returns true if a is greater or equal to b <strong>>=</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#len">len (a)</a></td>
+	<td class="summary">returns length of string or table <strong>#</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#add">add (a, b)</a></td>
+	<td class="summary">add two values <strong>+</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sub">sub (a, b)</a></td>
+	<td class="summary">subtract b from a <strong>-</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#mul">mul (a, b)</a></td>
+	<td class="summary">multiply two values <strong>*</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#div">div (a, b)</a></td>
+	<td class="summary">divide first value by second <strong>/</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pow">pow (a, b)</a></td>
+	<td class="summary">raise first to the power of second <strong>^</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#mod">mod (a, b)</a></td>
+	<td class="summary">modulo; remainder of a divided by b <strong>%</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#concat">concat (a, b)</a></td>
+	<td class="summary">concatenate two values (either strings or <code>__concat</code> defined) <strong>..</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#unm">unm (a)</a></td>
+	<td class="summary">return the negative of a value <strong>-</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lnot">lnot (a)</a></td>
+	<td class="summary">false if value evaluates as true <strong>not</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#land">land (a, b)</a></td>
+	<td class="summary">true if both values evaluate as true <strong>and</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lor">lor (a, b)</a></td>
+	<td class="summary">true if either value evaluate as true <strong>or</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#table">table (...)</a></td>
+	<td class="summary">make a table from the arguments <strong>{}</strong></td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#match">match (a, b)</a></td>
+	<td class="summary">match two strings <strong>~</strong>.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#nop">nop (...)</a></td>
+	<td class="summary">the null operation.</td>
+	</tr>
+</table>
+<h2><a href="#Tables">Tables</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#optable">optable</a></td>
+	<td class="summary">Map from operator symbol to function.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "call"></a>
+    <strong>call (fn, ...)</strong>
+    </dt>
+    <dd>
+    apply function to some arguments <strong>()</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+         a function or callable object
+        </li>
+        <li><span class="parameter">...</span>
+         arguments
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "index"></a>
+    <strong>index (t, k)</strong>
+    </dt>
+    <dd>
+    get the indexed value from a table <strong>[]</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         a table or any indexable object
+        </li>
+        <li><span class="parameter">k</span>
+         the key
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "eq"></a>
+    <strong>eq (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if arguments are equal <strong>==</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "neq"></a>
+    <strong>neq (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if arguments are not equal <strong>~=</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lt"></a>
+    <strong>lt (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if a is less than b <strong>&lt;</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "le"></a>
+    <strong>le (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if a is less or equal to b <strong>&lt;=</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "gt"></a>
+    <strong>gt (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if a is greater than b <strong>></strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "ge"></a>
+    <strong>ge (a, b)</strong>
+    </dt>
+    <dd>
+    returns true if a is greater or equal to b <strong>>=</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "len"></a>
+    <strong>len (a)</strong>
+    </dt>
+    <dd>
+    returns length of string or table <strong>#</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         a string or a table
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "add"></a>
+    <strong>add (a, b)</strong>
+    </dt>
+    <dd>
+    add two values <strong>+</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sub"></a>
+    <strong>sub (a, b)</strong>
+    </dt>
+    <dd>
+    subtract b from a <strong>-</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "mul"></a>
+    <strong>mul (a, b)</strong>
+    </dt>
+    <dd>
+    multiply two values <strong>*</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "div"></a>
+    <strong>div (a, b)</strong>
+    </dt>
+    <dd>
+    divide first value by second <strong>/</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pow"></a>
+    <strong>pow (a, b)</strong>
+    </dt>
+    <dd>
+    raise first to the power of second <strong>^</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "mod"></a>
+    <strong>mod (a, b)</strong>
+    </dt>
+    <dd>
+    modulo; remainder of a divided by b <strong>%</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "concat"></a>
+    <strong>concat (a, b)</strong>
+    </dt>
+    <dd>
+    concatenate two values (either strings or <code>__concat</code> defined) <strong>..</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "unm"></a>
+    <strong>unm (a)</strong>
+    </dt>
+    <dd>
+    return the negative of a value <strong>-</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lnot"></a>
+    <strong>lnot (a)</strong>
+    </dt>
+    <dd>
+    false if value evaluates as true <strong>not</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "land"></a>
+    <strong>land (a, b)</strong>
+    </dt>
+    <dd>
+    true if both values evaluate as true <strong>and</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lor"></a>
+    <strong>lor (a, b)</strong>
+    </dt>
+    <dd>
+    true if either value evaluate as true <strong>or</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         value
+        </li>
+        <li><span class="parameter">b</span>
+         value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "table"></a>
+    <strong>table (...)</strong>
+    </dt>
+    <dd>
+    make a table from the arguments <strong>{}</strong>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         non-nil arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "match"></a>
+    <strong>match (a, b)</strong>
+    </dt>
+    <dd>
+    match two strings <strong>~</strong>.
+ uses <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.find">string.find</a>
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+
+
+
+        </li>
+        <li><span class="parameter">b</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "nop"></a>
+    <strong>nop (...)</strong>
+    </dt>
+    <dd>
+    the null operation.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the arguments
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Tables"></a>Tables</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "optable"></a>
+    <strong>optable</strong>
+    </dt>
+    <dd>
+
+<p>Map from operator symbol to function.
+ Most of these map directly from operators;
+ But note these extras</p>
+
+<ul>
+    <li><strong>'()'</strong>  <a href="../libraries/pl.operator.html#call">call</a></li>
+    <li><strong>'[]'</strong>  <a href="../libraries/pl.operator.html#index">index</a></li>
+    <li><strong>'{}'</strong> <a href="../libraries/pl.operator.html#table">table</a></li>
+    <li><strong>'~'</strong>   <a href="../libraries/pl.operator.html#match">match</a></li>
+</ul>
+
+
+
+
+    <h3>Fields:</h3>
+    <ul>
+        <li><span class="parameter">operator</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.path.html b/Data/Libraries/Penlight/docs/libraries/pl.path.html
new file mode 100644
index 0000000..6345f6b
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.path.html
@@ -0,0 +1,1070 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Fields">Fields</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><strong>pl.path</strong></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.path</code></h1>
+<p>Path manipulation and file queries.</p>
+<p> This is modelled after Python's os.path library (10.1); see <a href="../manual/04-paths.md.html#">the Guide</a>.</p>
+
+<p> NOTE: the functions assume the paths being dealt with to originate
+ from the OS the application is running on. Windows drive letters are not
+ to be used when running on a Unix system for example. The one exception
+ is Windows paths to allow both forward and backward slashes (since Lua
+ also accepts those)</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="http://stevedonovan.github.io/lua-stdlibs/modules/lfs.html">lfs</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#dir">dir ()</a></td>
+	<td class="summary">Lua iterator over the entries of a given directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#mkdir">mkdir ()</a></td>
+	<td class="summary">Creates a directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rmdir">rmdir ()</a></td>
+	<td class="summary">Removes a directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#attrib">attrib ()</a></td>
+	<td class="summary">Gets attributes.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#currentdir">currentdir ()</a></td>
+	<td class="summary">Get the working directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#link_attrib">link_attrib ()</a></td>
+	<td class="summary">Gets symlink attributes.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#chdir">chdir ()</a></td>
+	<td class="summary">Changes the working directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isdir">isdir (P)</a></td>
+	<td class="summary">is this a directory?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isfile">isfile (P)</a></td>
+	<td class="summary">is this a file?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getsize">getsize (P)</a></td>
+	<td class="summary">return size of a file.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#exists">exists (P)</a></td>
+	<td class="summary">does a path exist?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getatime">getatime (P)</a></td>
+	<td class="summary">Return the time of last access as the number of seconds since the epoch.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getmtime">getmtime (P)</a></td>
+	<td class="summary">Return the time of last modification as the number of seconds since the epoch.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#getctime">getctime (P)</a></td>
+	<td class="summary">Return the system's ctime as the number of seconds since the epoch.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#splitpath">splitpath (P)</a></td>
+	<td class="summary">given a path, return the directory part and a file part.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#abspath">abspath (P[, pwd])</a></td>
+	<td class="summary">return an absolute path.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#splitext">splitext (P)</a></td>
+	<td class="summary">given a path, return the root part and the extension part.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dirname">dirname (P)</a></td>
+	<td class="summary">return the directory part of a path</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#basename">basename (P)</a></td>
+	<td class="summary">return the file part of a path</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#extension">extension (P)</a></td>
+	<td class="summary">get the extension part of a path.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isabs">isabs (P)</a></td>
+	<td class="summary">is this an absolute path?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#join">join (p1, p2, ...)</a></td>
+	<td class="summary">return the path resulting from combining the individual paths.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#normcase">normcase (P)</a></td>
+	<td class="summary">normalize the case of a pathname.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#normpath">normpath (P)</a></td>
+	<td class="summary">normalize a path name.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#relpath">relpath (P[, start])</a></td>
+	<td class="summary">relative path from current directory or optional start point</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#expanduser">expanduser (P)</a></td>
+	<td class="summary">Replace a starting '~' with the user's home directory.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#tmpname">tmpname ()</a></td>
+	<td class="summary">Return a suitable full path to a new temporary file name.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#common_prefix">common_prefix (path1, path2)</a></td>
+	<td class="summary">return the largest common prefix path of two paths.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#package_path">package_path (mod)</a></td>
+	<td class="summary">return the full path where a particular Lua module would be found.</td>
+	</tr>
+</table>
+<h2><a href="#Fields">Fields</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#is_windows">is_windows</a></td>
+	<td class="summary">are we running Windows?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sep">sep</a></td>
+	<td class="summary">path separator for this platform.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dirsep">dirsep</a></td>
+	<td class="summary">separator for PATH for this platform</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "dir"></a>
+    <strong>dir ()</strong>
+    </dt>
+    <dd>
+    Lua iterator over the entries of a given directory.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.dir</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "mkdir"></a>
+    <strong>mkdir ()</strong>
+    </dt>
+    <dd>
+    Creates a directory.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.mkdir</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "rmdir"></a>
+    <strong>rmdir ()</strong>
+    </dt>
+    <dd>
+    Removes a directory.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.rmdir</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "attrib"></a>
+    <strong>attrib ()</strong>
+    </dt>
+    <dd>
+    Gets attributes.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.attributes</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "currentdir"></a>
+    <strong>currentdir ()</strong>
+    </dt>
+    <dd>
+    Get the working directory.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.currentdir</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "link_attrib"></a>
+    <strong>link_attrib ()</strong>
+    </dt>
+    <dd>
+    Gets symlink attributes.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.symlinkattributes</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "chdir"></a>
+    <strong>chdir ()</strong>
+    </dt>
+    <dd>
+    Changes the working directory.
+ On Windows, if a drive is specified, it also changes the current drive. If
+ only specifying the drive, it will only switch drive, but not modify the path.
+ Implicit link to <a href="https://keplerproject.github.io/luafilesystem/manual.html#reference"><code>luafilesystem.chdir</code></a>
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isdir"></a>
+    <strong>isdir (P)</strong>
+    </dt>
+    <dd>
+    is this a directory?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isfile"></a>
+    <strong>isfile (P)</strong>
+    </dt>
+    <dd>
+    is this a file?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getsize"></a>
+    <strong>getsize (P)</strong>
+    </dt>
+    <dd>
+    return size of a file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "exists"></a>
+    <strong>exists (P)</strong>
+    </dt>
+    <dd>
+    does a path exist?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the file path if it exists (either as file, directory, socket, etc), nil otherwise
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getatime"></a>
+    <strong>getatime (P)</strong>
+    </dt>
+    <dd>
+    Return the time of last access as the number of seconds since the epoch.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getmtime"></a>
+    <strong>getmtime (P)</strong>
+    </dt>
+    <dd>
+    Return the time of last modification as the number of seconds since the epoch.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "getctime"></a>
+    <strong>getctime (P)</strong>
+    </dt>
+    <dd>
+    Return the system's ctime as the number of seconds since the epoch.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "splitpath"></a>
+    <strong>splitpath (P)</strong>
+    </dt>
+    <dd>
+    given a path, return the directory part and a file part.
+ if there's no directory part, the first value will be empty
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        directory part</li>
+        <li>
+        file part</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> dir, file = path.splitpath(<span class="string">"some/dir/myfile.txt"</span>)
+<span class="global">assert</span>(dir == <span class="string">"some/dir"</span>)
+<span class="global">assert</span>(file == <span class="string">"myfile.txt"</span>)
+
+<span class="keyword">local</span> dir, file = path.splitpath(<span class="string">"some/dir/"</span>)
+<span class="global">assert</span>(dir == <span class="string">"some/dir"</span>)
+<span class="global">assert</span>(file == <span class="string">""</span>)
+
+<span class="keyword">local</span> dir, file = path.splitpath(<span class="string">"some_dir"</span>)
+<span class="global">assert</span>(dir == <span class="string">""</span>)
+<span class="global">assert</span>(file == <span class="string">"some_dir"</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "abspath"></a>
+    <strong>abspath (P[, pwd])</strong>
+    </dt>
+    <dd>
+    return an absolute path.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+        <li><span class="parameter">pwd</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         optional start path to use (default is current dir)
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "splitext"></a>
+    <strong>splitext (P)</strong>
+    </dt>
+    <dd>
+    given a path, return the root part and the extension part.
+ if there's no extension part, the second value will be empty
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        root part (everything upto the "."", maybe empty)</li>
+        <li>
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        extension part (including the ".", maybe empty)</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> file_path, ext = path.splitext(<span class="string">"/bonzo/dog_stuff/cat.txt"</span>)
+<span class="global">assert</span>(file_path == <span class="string">"/bonzo/dog_stuff/cat"</span>)
+<span class="global">assert</span>(ext == <span class="string">".txt"</span>)
+
+<span class="keyword">local</span> file_path, ext = path.splitext(<span class="string">""</span>)
+<span class="global">assert</span>(file_path == <span class="string">""</span>)
+<span class="global">assert</span>(ext == <span class="string">""</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "dirname"></a>
+    <strong>dirname (P)</strong>
+    </dt>
+    <dd>
+    return the directory part of a path
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        everything before the last dir-separator
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.path.html#splitpath">splitpath</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.dirname(<span class="string">"/some/path/file.txt"</span>)   <span class="comment">-- "/some/path"
+</span>path.dirname(<span class="string">"file.txt"</span>)              <span class="comment">-- "" (empty string)</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "basename"></a>
+    <strong>basename (P)</strong>
+    </dt>
+    <dd>
+    return the file part of a path
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+
+
+
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.path.html#splitpath">splitpath</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.basename(<span class="string">"/some/path/file.txt"</span>)  <span class="comment">-- "file.txt"
+</span>path.basename(<span class="string">"/some/path/file/"</span>)     <span class="comment">-- "" (empty string)</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "extension"></a>
+    <strong>extension (P)</strong>
+    </dt>
+    <dd>
+    get the extension part of a path.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+
+
+
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.path.html#splitext">splitext</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.extension(<span class="string">"/some/path/file.txt"</span>) <span class="comment">-- ".txt"
+</span>path.extension(<span class="string">"/some/path/file_txt"</span>) <span class="comment">-- "" (empty string)</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "isabs"></a>
+    <strong>isabs (P)</strong>
+    </dt>
+    <dd>
+    is this an absolute path?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.isabs(<span class="string">"hello/path"</span>)    <span class="comment">-- false
+</span>path.isabs(<span class="string">"/hello/path"</span>)   <span class="comment">-- true
+</span><span class="comment">-- Windows;
+</span>path.isabs(<span class="string">"hello\path"</span>)    <span class="comment">-- false
+</span>path.isabs(<span class="string">"\hello\path"</span>)   <span class="comment">-- true
+</span>path.isabs(<span class="string">"C:\hello\path"</span>) <span class="comment">-- true
+</span>path.isabs(<span class="string">"C:hello\path"</span>)  <span class="comment">-- false</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "join"></a>
+    <strong>join (p1, p2, ...)</strong>
+    </dt>
+    <dd>
+    return the path resulting from combining the individual paths.
+ if the second (or later) path is absolute, we return the last absolute path (joined with any non-absolute paths following).
+ empty elements (except the last) will be ignored.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">p1</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+        <li><span class="parameter">p2</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+        <li><span class="parameter">...</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         more file paths
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+        the combined path
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.join(<span class="string">"/first"</span>,<span class="string">"second"</span>,<span class="string">"third"</span>)   <span class="comment">-- "/first/second/third"
+</span>path.join(<span class="string">"first"</span>,<span class="string">"second/third"</span>)      <span class="comment">-- "first/second/third"
+</span>path.join(<span class="string">"/first"</span>,<span class="string">"/second"</span>,<span class="string">"third"</span>)  <span class="comment">-- "/second/third"</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "normcase"></a>
+    <strong>normcase (P)</strong>
+    </dt>
+    <dd>
+
+<p>normalize the case of a pathname.  On Unix, this returns the path unchanged,
+ for Windows it converts;</p>
+
+<ul>
+    <li>the path to lowercase</li>
+    <li>forward slashes to backward slashes</li>
+</ul>
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">path.normcase(<span class="string">"/Some/Path/File.txt"</span>)
+<span class="comment">-- Windows: "\some\path\file.txt"
+</span><span class="comment">-- Others : "/Some/Path/File.txt"</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "normpath"></a>
+    <strong>normpath (P)</strong>
+    </dt>
+    <dd>
+    normalize a path name.
+ <code>A//B</code>, <code>A/./B</code>, and <code>A/foo/../B</code> all become <code>A/B</code>.</p>
+
+<p> An empty path results in '.'.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "relpath"></a>
+    <strong>relpath (P[, start])</strong>
+    </dt>
+    <dd>
+    relative path from current directory or optional start point
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a path
+        </li>
+        <li><span class="parameter">start</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         optional start point (default current directory)
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "expanduser"></a>
+    <strong>expanduser (P)</strong>
+    </dt>
+    <dd>
+    Replace a starting '~' with the user's home directory.
+ In windows, if HOME isn't set, then USERPROFILE is used in preference to
+ HOMEDRIVE HOMEPATH. This is guaranteed to be writeable on all versions of Windows.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">P</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         A file path
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "tmpname"></a>
+    <strong>tmpname ()</strong>
+    </dt>
+    <dd>
+    Return a suitable full path to a new temporary file name.
+ unlike os.tmpname(), it always gives you a writeable path (uses TEMP environment variable on Windows)
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "common_prefix"></a>
+    <strong>common_prefix (path1, path2)</strong>
+    </dt>
+    <dd>
+    return the largest common prefix path of two paths.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">path1</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a file path
+        </li>
+        <li><span class="parameter">path2</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the common prefix (Windows: separators will be normalized, casing will be original)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "package_path"></a>
+    <strong>package_path (mod)</strong>
+    </dt>
+    <dd>
+    return the full path where a particular Lua module would be found.
+ Both package.path and package.cpath is searched, so the result may
+ either be a Lua file or a shared library.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">mod</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         name of the module
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        on success: path of module, lua or binary</li>
+        <li>
+        on error: nil, error string listing paths tried</li>
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Fields"></a>Fields</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "is_windows"></a>
+    <strong>is_windows</strong>
+    </dt>
+    <dd>
+    are we running Windows?
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sep"></a>
+    <strong>sep</strong>
+    </dt>
+    <dd>
+    path separator for this platform.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "dirsep"></a>
+    <strong>dirsep</strong>
+    </dt>
+    <dd>
+    separator for PATH for this platform
+
+
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.permute.html b/Data/Libraries/Penlight/docs/libraries/pl.permute.html
new file mode 100644
index 0000000..afb887e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.permute.html
@@ -0,0 +1,354 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><strong>pl.permute</strong></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.permute</code></h1>
+<p>Permutation operations.</p>
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#order_iter">order_iter (a)</a></td>
+	<td class="summary">an iterator over all order-permutations of the elements of a list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#order_table">order_table (a)</a></td>
+	<td class="summary">construct a table containing all the order-permutations of a list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#list_iter">list_iter (...)</a></td>
+	<td class="summary">an iterator over all permutations of the elements of the given lists.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#list_table">list_table (...)</a></td>
+	<td class="summary">construct a table containing all the permutations of a set of lists.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#iter">iter (...)</a></td>
+	<td class="summary">deprecated.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#table">table (...)</a></td>
+	<td class="summary">deprecated.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "order_iter"></a>
+    <strong>order_iter (a)</strong>
+    </dt>
+    <dd>
+    an iterator over all order-permutations of the elements of a list.
+ Please note that the same list is returned each time, so do not keep references!
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         list-like table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator which provides the next permutation as a list
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "order_table"></a>
+    <strong>order_table (a)</strong>
+    </dt>
+    <dd>
+    construct a table containing all the order-permutations of a list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         list-like table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table of tables
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">permute.order_table {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>} <span class="comment">--&gt; {{2,3,1},{3,2,1},{3,1,2},{1,3,2},{2,1,3},{1,2,3}}</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "list_iter"></a>
+    <strong>list_iter (...)</strong>
+    </dt>
+    <dd>
+    an iterator over all permutations of the elements of the given lists.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         list-like tables, they are nil-safe if a length-field <code>n</code> is provided (see <a href="../libraries/pl.utils.html#pack">utils.pack</a>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator which provides the next permutation as return values in the same order as the provided lists, preceeded by an index
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> strs = utils.pack(<span class="string">"one"</span>, <span class="keyword">nil</span>, <span class="string">"three"</span>)  <span class="comment">-- adds an 'n' field for nil-safety
+</span><span class="keyword">local</span> bools = utils.pack(<span class="keyword">true</span>, <span class="keyword">false</span>)
+<span class="keyword">local</span> iter = permute.list_iter(strs, bools)
+
+<span class="global">print</span>(iter())    <span class="comment">--&gt; 1, one, true
+</span><span class="global">print</span>(iter())    <span class="comment">--&gt; 2, nil, true
+</span><span class="global">print</span>(iter())    <span class="comment">--&gt; 3, three, true
+</span><span class="global">print</span>(iter())    <span class="comment">--&gt; 4, one, false
+</span><span class="global">print</span>(iter())    <span class="comment">--&gt; 5, nil, false
+</span><span class="global">print</span>(iter())    <span class="comment">--&gt; 6, three, false</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "list_table"></a>
+    <strong>list_table (...)</strong>
+    </dt>
+    <dd>
+    construct a table containing all the permutations of a set of lists.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         list-like tables, they are nil-safe if a length-field <code>n</code> is provided
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list of lists, the sub-lists have an 'n' field for nil-safety
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> strs = utils.pack(<span class="string">"one"</span>, <span class="keyword">nil</span>, <span class="string">"three"</span>)  <span class="comment">-- adds an 'n' field for nil-safety
+</span><span class="keyword">local</span> bools = utils.pack(<span class="keyword">true</span>, <span class="keyword">false</span>)
+<span class="keyword">local</span> results = permute.list_table(strs, bools)
+<span class="comment">-- results = {
+</span><span class="comment">--   { "one, true, n = 2 }
+</span><span class="comment">--   { nil, true, n = 2 },
+</span><span class="comment">--   { "three, true, n = 2 },
+</span><span class="comment">--   { "one, false, n = 2 },
+</span><span class="comment">--   { nil, false, n = 2 },
+</span><span class="comment">--   { "three", false, n = 2 },
+</span><span class="comment">-- }</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "iter"></a>
+    <strong>iter (...)</strong>
+    </dt>
+    <dd>
+    deprecated.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.permute.html#order_iter">permute.order_iter</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "table"></a>
+    <strong>table (...)</strong>
+    </dt>
+    <dd>
+    deprecated.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.permute.html#order_iter">permute.order_iter</a>
+    </ul>
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.pretty.html b/Data/Libraries/Penlight/docs/libraries/pl.pretty.html
new file mode 100644
index 0000000..4561699
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.pretty.html
@@ -0,0 +1,402 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><strong>pl.pretty</strong></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.pretty</code></h1>
+<p>Pretty-printing Lua tables.</p>
+<p> Also provides a sandboxed Lua table reader and
+ a function to present large numbers in human-friendly format.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.lexer.html#">pl.lexer</a>, <a href="../libraries/pl.stringx.html#">pl.stringx</a>, <a href="../libraries/pl.pretty.html#debug">debug</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#read">read (s)</a></td>
+	<td class="summary">Read a string representation of a Lua table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#load">load (s[, env[, paranoid]])</a></td>
+	<td class="summary">Read a Lua chunk.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#write">write (tbl[, space[, not_clever]])</a></td>
+	<td class="summary">Create a string representation of a Lua table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dump">dump (t[, filename])</a></td>
+	<td class="summary">Dump a Lua table out to a file or stdout.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#debug">debug (...)</a></td>
+	<td class="summary">Dump a series of arguments to stdout for debug purposes.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#number">number (num[, kind[, prec]])</a></td>
+	<td class="summary">Format large numbers nicely for human consumption.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "read"></a>
+    <strong>read (s)</strong>
+    </dt>
+    <dd>
+    Read a string representation of a Lua table.
+ This function loads and runs the string as Lua code, but bails out
+ if it contains a function definition.
+ Loaded string is executed in an empty environment.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         string to read in <code>{...}</code> format, possibly with some whitespace
+ before or after the curly braces. A single line comment may be present
+ at the beginning.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+         a table in case of success.
+ If loading the string failed, return <code>nil</code> and error message.
+ If executing loaded string failed, return <code>nil</code> and the error it raised.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "load"></a>
+    <strong>load (s[, env[, paranoid]])</strong>
+    </dt>
+    <dd>
+    Read a Lua chunk.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         Lua code.
+        </li>
+        <li><span class="parameter">env</span>
+            <span class="types"><span class="type">tab</span></span>
+         environment used to run the code, empty by default.
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">paranoid</span>
+            <span class="types"><span class="type">bool</span></span>
+         abort loading if any looping constructs a found in the code
+ and disable string methods.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the environment in case of success or <code>nil</code> and syntax or runtime error
+ if something went wrong.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "write"></a>
+    <strong>write (tbl[, space[, not_clever]])</strong>
+    </dt>
+    <dd>
+    Create a string representation of a Lua table.
+ This function never fails, but may complain by returning an
+ extra value. Normally puts out one item per line, using
+ the provided indent; set the second parameter to an empty string
+ if you want output on one line.</p>
+
+<p> <em>NOTE:</em> this is NOT a serialization function, not a full blown
+ debug function. Checkout out respectively the
+ <a href="https://github.com/pkulchenko/serpent">serpent</a>
+ or <a href="https://github.com/kikito/inspect.lua">inspect</a>
+ Lua modules for that if you need them.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tbl</span>
+            <span class="types"><span class="type">tab</span></span>
+         Table to serialize to a string.
+        </li>
+        <li><span class="parameter">space</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         The indent to use.
+ Defaults to two spaces; pass an empty string for no indentation.
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">not_clever</span>
+            <span class="types"><span class="type">bool</span></span>
+         Pass <code>true</code> for plain output, e.g <code>{[&apos;key&apos;]=1}</code>.
+ Defaults to <code>false</code>.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a string</li>
+        <li>
+        an optional error message</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "dump"></a>
+    <strong>dump (t[, filename])</strong>
+    </dt>
+    <dd>
+    Dump a Lua table out to a file or stdout.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         The table to write to a file or stdout.
+        </li>
+        <li><span class="parameter">filename</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         File name to write too. Defaults to writing
+ to stdout.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "debug"></a>
+    <strong>debug (...)</strong>
+    </dt>
+    <dd>
+    Dump a series of arguments to stdout for debug purposes.
+ This function is attached to the module table <code>__call</code> method, to make it
+ extra easy to access. So the full:</p>
+
+<pre><code> print(require("pl.pretty").write({...}))
+</code></pre>
+
+<p> Can be shortened to:</p>
+
+<pre><code> require"pl.pretty" (...)
+</code></pre>
+
+<p> Any <code>nil</code> entries will be printed as <code>&quot;&lt;nil&gt;&quot;</code> to make them explicit.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         the parameters to dump to stdout.
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- example debug output
+</span><span class="global">require</span><span class="string">"pl.pretty"</span> (<span class="string">"hello"</span>, <span class="keyword">nil</span>, <span class="string">"world"</span>, { bye = <span class="string">"world"</span>, <span class="keyword">true</span>} )
+
+<span class="comment">-- output:
+</span>{
+  [<span class="string">"arg 1"</span>] = <span class="string">"hello"</span>,
+  [<span class="string">"arg 2"</span>] = <span class="string">"&lt;nil&gt;"</span>,
+  [<span class="string">"arg 3"</span>] = <span class="string">"world"</span>,
+  [<span class="string">"arg 4"</span>] = {
+    <span class="keyword">true</span>,
+    bye = <span class="string">"world"</span>
+  }
+}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "number"></a>
+    <strong>number (num[, kind[, prec]])</strong>
+    </dt>
+    <dd>
+    Format large numbers nicely for human consumption.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">num</span>
+            <span class="types"><a class="type" href="../libraries/pl.pretty.html#number">number</a></span>
+         a number.
+        </li>
+        <li><span class="parameter">kind</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         one of <code>&apos;M&apos;</code> (memory in <code>KiB</code>, <code>MiB</code>, etc.),
+ <code>&apos;N&apos;</code> (postfixes are <code>&apos;K&apos;</code>, <code>&apos;M&apos;</code> and <code>&apos;B&apos;</code>),
+ or <code>&apos;T&apos;</code> (use commas as thousands separator), <code>&apos;N&apos;</code> by default.
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">prec</span>
+            <span class="types"><span class="type">int</span></span>
+         number of digits to use for <code>&apos;M&apos;</code> and <code>&apos;N&apos;</code>, <code>1</code> by default.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.seq.html b/Data/Libraries/Penlight/docs/libraries/pl.seq.html
new file mode 100644
index 0000000..e694581
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.seq.html
@@ -0,0 +1,888 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><strong>pl.seq</strong></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.seq</code></h1>
+<p>Manipulating iterators as sequences.</p>
+<p> See <a href="../manual/07-functional.md.html#Sequences">The Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.types.html#">pl.types</a>, <a href="https://www.lua.org/manual/5.1/manual.html#5.9">debug</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#matching">matching (s)</a></td>
+	<td class="summary">given a string, return a function(y) which matches y against the string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#list">list (t)</a></td>
+	<td class="summary">sequence adaptor for a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#keys">keys (t)</a></td>
+	<td class="summary">return the keys of the table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#range">range (start, finish)</a></td>
+	<td class="summary">create an iterator over a numerical range.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#minmax">minmax (iter)</a></td>
+	<td class="summary">return the minimum and the maximum value of the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sum">sum (iter, fn)</a></td>
+	<td class="summary">return the sum and element count of the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copy">copy (iter)</a></td>
+	<td class="summary">create a table from the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copy2">copy2 (iter, i1, i2)</a></td>
+	<td class="summary">create a table of pairs from the double-valued sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copy_tuples">copy_tuples (iter)</a></td>
+	<td class="summary">create a table of 'tuples' from a multi-valued sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#random">random (n, l, u)</a></td>
+	<td class="summary">return an iterator of random numbers.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sort">sort (iter, comp)</a></td>
+	<td class="summary">return an iterator to the sorted elements of a sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#zip">zip (iter1, iter2)</a></td>
+	<td class="summary">return an iterator which returns elements of two sequences.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#count_map">count_map (iter)</a></td>
+	<td class="summary">Makes a table where the key/values are the values and value counts of the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#printall">printall (iter, sep, nfields, fmt)</a></td>
+	<td class="summary">print out a sequence iter with a separator.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map">map (fn, iter, arg)</a></td>
+	<td class="summary">return a sequence where every element of a sequence has been transformed
+ by a function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#filter">filter (iter, pred, arg)</a></td>
+	<td class="summary">filter a sequence using a predicate function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reduce">reduce (fn, iter, initval)</a></td>
+	<td class="summary">'reduce' a sequence using a binary function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#take">take (iter, n)</a></td>
+	<td class="summary">take the first n values from the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#skip">skip (iter, n)</a></td>
+	<td class="summary">skip the first n values of a sequence</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#enum">enum (iter)</a></td>
+	<td class="summary">a sequence with a sequence count and the original value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#mapmethod">mapmethod (iter, name, arg1, arg2)</a></td>
+	<td class="summary">map using a named method over a sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#last">last (iter)</a></td>
+	<td class="summary">a sequence of (last,current) values from another sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#foreach">foreach (iter, fn)</a></td>
+	<td class="summary">call the function on each element of the sequence.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lines">lines (f, ...)</a></td>
+	<td class="summary">create a wrapped iterator over all lines in the file.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "matching"></a>
+    <strong>matching (s)</strong>
+    </dt>
+    <dd>
+    given a string, return a function(y) which matches y against the string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "list"></a>
+    <strong>list (t)</strong>
+    </dt>
+    <dd>
+    sequence adaptor for a table.    Note that if any generic function is
+ passed a table, it will automatically use seq.list()
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         a list-like table
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">sum(list(t)) is the sum of all elements of t</pre></li>
+        <li><pre class="example"><span class="keyword">for</span> x <span class="keyword">in</span> list(t) <span class="keyword">do</span>...<span class="keyword">end</span></pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "keys"></a>
+    <strong>keys (t)</strong>
+    </dt>
+    <dd>
+    return the keys of the table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         an arbitrary table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        iterator over keys
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "range"></a>
+    <strong>range (start, finish)</strong>
+    </dt>
+    <dd>
+    create an iterator over a numerical range.  Like the standard Python function xrange.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">start</span>
+         a number
+        </li>
+        <li><span class="parameter">finish</span>
+         a number greater than start
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "minmax"></a>
+    <strong>minmax (iter)</strong>
+    </dt>
+    <dd>
+    return the minimum and the maximum value of the sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        minimum value</li>
+        <li>
+        maximum value</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sum"></a>
+    <strong>sum (iter, fn)</strong>
+    </dt>
+    <dd>
+    return the sum and element count of the sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+        <li><span class="parameter">fn</span>
+         an optional function to apply to the values
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "copy"></a>
+    <strong>copy (iter)</strong>
+    </dt>
+    <dd>
+    create a table from the sequence.  (This will make the result a List.)
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a List
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">copy(list(ls)) is equal to ls</pre></li>
+        <li><pre class="example">copy(list {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}) == List{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "copy2"></a>
+    <strong>copy2 (iter, i1, i2)</strong>
+    </dt>
+    <dd>
+    create a table of pairs from the double-valued sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a double-valued sequence
+        </li>
+        <li><span class="parameter">i1</span>
+         used to capture extra iterator values
+        </li>
+        <li><span class="parameter">i2</span>
+         as with pairs &amp; ipairs
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list-like table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">copy2(<span class="global">ipairs</span>{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}) == {{<span class="number">1</span>,<span class="number">10</span>},{<span class="number">2</span>,<span class="number">20</span>},{<span class="number">3</span>,<span class="number">30</span>}}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "copy_tuples"></a>
+    <strong>copy_tuples (iter)</strong>
+    </dt>
+    <dd>
+    create a table of 'tuples' from a multi-valued sequence.
+ A generalization of copy2 above
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a multiple-valued sequence
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list-like table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "random"></a>
+    <strong>random (n, l, u)</strong>
+    </dt>
+    <dd>
+    return an iterator of random numbers.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">n</span>
+         the length of the sequence
+        </li>
+        <li><span class="parameter">l</span>
+         same as the first optional argument to math.random
+        </li>
+        <li><span class="parameter">u</span>
+         same as the second optional argument to math.random
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a sequence
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sort"></a>
+    <strong>sort (iter, comp)</strong>
+    </dt>
+    <dd>
+    return an iterator to the sorted elements of a sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+        <li><span class="parameter">comp</span>
+         an optional comparison function (comp(x,y) is true if x &lt; y)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "zip"></a>
+    <strong>zip (iter1, iter2)</strong>
+    </dt>
+    <dd>
+    return an iterator which returns elements of two sequences.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter1</span>
+         a sequence
+        </li>
+        <li><span class="parameter">iter2</span>
+         a sequence
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">for</span> x,y <span class="keyword">in</span> seq.zip(ls1,ls2) <span class="keyword">do</span>....<span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "count_map"></a>
+    <strong>count_map (iter)</strong>
+    </dt>
+    <dd>
+    Makes a table where the key/values are the values and value counts of the sequence.
+ This version works with 'hashable' values like strings and numbers.
+ <a href="../libraries/pl.tablex.html#count_map">pl.tablex.count_map</a> is more general.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a map-like table</li>
+        <li>
+        a table</li>
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#count_map">pl.tablex.count_map</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "printall"></a>
+    <strong>printall (iter, sep, nfields, fmt)</strong>
+    </dt>
+    <dd>
+    print out a sequence iter with a separator.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+        <li><span class="parameter">sep</span>
+         the separator (default space)
+        </li>
+        <li><span class="parameter">nfields</span>
+         maximum number of values per line (default 7)
+        </li>
+        <li><span class="parameter">fmt</span>
+         optional format function for each value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "map"></a>
+    <strong>map (fn, iter, arg)</strong>
+    </dt>
+    <dd>
+    return a sequence where every element of a sequence has been transformed
+ by a function.  If you don't supply an argument, then the function will
+ receive both values of a double-valued sequence, otherwise behaves rather like
+ tablex.map.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+         a function to apply to elements; may take two arguments
+        </li>
+        <li><span class="parameter">iter</span>
+         a sequence of one or two values
+        </li>
+        <li><span class="parameter">arg</span>
+         optional argument to pass to function.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "filter"></a>
+    <strong>filter (iter, pred, arg)</strong>
+    </dt>
+    <dd>
+    filter a sequence using a predicate function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence of one or two values
+        </li>
+        <li><span class="parameter">pred</span>
+         a boolean function; may take two arguments
+        </li>
+        <li><span class="parameter">arg</span>
+         optional argument to pass to function.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "reduce"></a>
+    <strong>reduce (fn, iter, initval)</strong>
+    </dt>
+    <dd>
+    'reduce' a sequence using a binary function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of two arguments
+        </li>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+        <li><span class="parameter">initval</span>
+         optional initial value
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">seq.reduce(operator.add,seq.list{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>}) == <span class="number">10</span></pre></li>
+        <li><pre class="example">seq.reduce(<span class="string">'-'</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>}) == -<span class="number">13</span></pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "take"></a>
+    <strong>take (iter, n)</strong>
+    </dt>
+    <dd>
+    take the first n values from the sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence of one or two values
+        </li>
+        <li><span class="parameter">n</span>
+         number of items to take
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a sequence of at most n items
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "skip"></a>
+    <strong>skip (iter, n)</strong>
+    </dt>
+    <dd>
+    skip the first n values of a sequence
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence of one or more values
+        </li>
+        <li><span class="parameter">n</span>
+         number of items to skip
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "enum"></a>
+    <strong>enum (iter)</strong>
+    </dt>
+    <dd>
+    a sequence with a sequence count and the original value.
+ enum(copy(ls)) is a roundabout way of saying ipairs(ls).
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a single or double valued sequence
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        sequence of (i,v), i = 1..n and v is from iter.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "mapmethod"></a>
+    <strong>mapmethod (iter, name, arg1, arg2)</strong>
+    </dt>
+    <dd>
+    map using a named method over a sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+        <li><span class="parameter">name</span>
+         the method name
+        </li>
+        <li><span class="parameter">arg1</span>
+         optional first extra argument
+        </li>
+        <li><span class="parameter">arg2</span>
+         optional second extra argument
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "last"></a>
+    <strong>last (iter)</strong>
+    </dt>
+    <dd>
+    a sequence of (last,current) values from another sequence.
+  This will return S(i-1),S(i) if given S(i)
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "foreach"></a>
+    <strong>foreach (iter, fn)</strong>
+    </dt>
+    <dd>
+    call the function on each element of the sequence.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">iter</span>
+         a sequence with up to 3 values
+        </li>
+        <li><span class="parameter">fn</span>
+         a function
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "lines"></a>
+    <strong>lines (f, ...)</strong>
+    </dt>
+    <dd>
+    create a wrapped iterator over all lines in the file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         either a filename, file-like object, or 'STDIN' (for standard input)
+        </li>
+        <li><span class="parameter">...</span>
+         for Lua 5.2 only, optional format specifiers, as in <a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.read">io.read</a>.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a sequence wrapper
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.sip.html b/Data/Libraries/Penlight/docs/libraries/pl.sip.html
new file mode 100644
index 0000000..d488b09
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.sip.html
@@ -0,0 +1,399 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><strong>pl.sip</strong></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.sip</code></h1>
+<p>Simple Input Patterns (SIP).</p>
+<p> SIP patterns start with '$', then a
+ one-letter type, and then an optional variable in curly braces.</p>
+
+
+<pre>
+sip.match(<span class="string">'$v=$q'</span>,<span class="string">'name="dolly"'</span>,res)
+==&gt; res=={<span class="string">'name'</span>,<span class="string">'dolly'</span>}
+sip.match(<span class="string">'($q{first},$q{second})'</span>,<span class="string">'("john","smith")'</span>,res)
+==&gt; res=={second=<span class="string">'smith'</span>,first=<span class="string">'john'</span>}
+</pre>
+
+<p> Type names:</p>
+
+
+<pre>
+v     identifier
+i     integer
+f     floating-point
+q     quoted <span class="global">string</span>
+([{&lt;  match up to closing bracket
+</pre>
+
+<p> See <a href="../manual/08-additional.md.html#Simple_Input_Patterns">the Guide</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#create_pattern">create_pattern (spec, options)</a></td>
+	<td class="summary">convert a SIP pattern into the equivalent Lua string pattern.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compile">compile (spec, options)</a></td>
+	<td class="summary">convert a SIP pattern into a matching function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#match">match (spec, line, res, options)</a></td>
+	<td class="summary">match a SIP pattern against a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#match_at_start">match_at_start (spec, line, res)</a></td>
+	<td class="summary">match a SIP pattern against the start of a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#fields">fields (spec, f)</a></td>
+	<td class="summary">given a pattern and a file object, return an iterator over the results</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pattern">pattern (spec, fun)</a></td>
+	<td class="summary">register a match which will be used in the read function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#read">read (f, matches)</a></td>
+	<td class="summary">enter a loop which applies all registered matches to the input file.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "create_pattern"></a>
+    <strong>create_pattern (spec, options)</strong>
+    </dt>
+    <dd>
+    convert a SIP pattern into the equivalent Lua string pattern.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">options</span>
+         a table; only the <code>at_start</code> field is
+ currently meaningful and ensures that the pattern is anchored
+ at the start of the string.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a Lua string pattern.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "compile"></a>
+    <strong>compile (spec, options)</strong>
+    </dt>
+    <dd>
+    convert a SIP pattern into a matching function.
+ The returned function takes two arguments, the line and an empty table.
+ If the line matched the pattern, then this function returns true
+ and the table is filled with field-value pairs.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">options</span>
+         optional table; {at_start=true} ensures that the pattern
+ is anchored at the start of the string.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function if successful, or nil,error
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "match"></a>
+    <strong>match (spec, line, res, options)</strong>
+    </dt>
+    <dd>
+    match a SIP pattern against a string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">line</span>
+         a string
+        </li>
+        <li><span class="parameter">res</span>
+         a table to receive values
+        </li>
+        <li><span class="parameter">options</span>
+         (optional) option table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "match_at_start"></a>
+    <strong>match_at_start (spec, line, res)</strong>
+    </dt>
+    <dd>
+    match a SIP pattern against the start of a string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">line</span>
+         a string
+        </li>
+        <li><span class="parameter">res</span>
+         a table to receive values
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "fields"></a>
+    <strong>fields (spec, f)</strong>
+    </dt>
+    <dd>
+    given a pattern and a file object, return an iterator over the results
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">f</span>
+         a file-like object.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "pattern"></a>
+    <strong>pattern (spec, fun)</strong>
+    </dt>
+    <dd>
+    register a match which will be used in the read function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">spec</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a SIP pattern
+        </li>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function to be called with the results of the match
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.sip.html#read">read</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "read"></a>
+    <strong>read (f, matches)</strong>
+    </dt>
+    <dd>
+    enter a loop which applies all registered matches to the input file.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         a file-like object
+        </li>
+        <li><span class="parameter">matches</span>
+            <span class="types"><span class="type">array</span></span>
+         optional list of <code>{spec,fun}</code> pairs, as for <a href="../libraries/pl.sip.html#pattern">pattern</a> above.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.strict.html b/Data/Libraries/Penlight/docs/libraries/pl.strict.html
new file mode 100644
index 0000000..3c9c0bd
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.strict.html
@@ -0,0 +1,270 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><strong>pl.strict</strong></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.strict</code></h1>
+<p>Checks uses of undeclared global variables.</p>
+<p> All global variables must be 'declared' through a regular assignment
+ (even assigning <code>nil</code> will do) in a main chunk before being used
+ anywhere or assigned to inside a function. Existing metatables <code>__newindex</code> and <code>__index</code>
+ metamethods are respected.</p>
+
+<p> You can set any table to have strict behaviour using <a href="../libraries/pl.strict.html#module">strict.module</a>. Creating a new
+ module with <a href="../libraries/pl.strict.html#closed_module">strict.closed_module</a> makes the module immune to monkey-patching, if
+ you don't wish to encourage monkey business.</p>
+
+<p> If the global <code>PENLIGHT_NO_GLOBAL_STRICT</code> is defined, then this module won't make the
+ global environment strict - if you just want to explicitly set table strictness.</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#module">module ([name[, mod[, predeclared]]])</a></td>
+	<td class="summary">make an existing table strict.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#make_all_strict">make_all_strict (T)</a></td>
+	<td class="summary">make all tables in a table strict.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#closed_module">closed_module (mod, name)</a></td>
+	<td class="summary">make a new module table which is closed to further changes.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "module"></a>
+    <strong>module ([name[, mod[, predeclared]]])</strong>
+    </dt>
+    <dd>
+    make an existing table strict.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         name of table
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">mod</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table to protect - if <code>nil</code> then we'll return a new table
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">predeclared</span>
+            <span class="types"><span class="type">tab</span></span>
+
+<ul>
+    <li>table of variables that are to be considered predeclared.</li>
+</ul>
+
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the given table, or a new table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> M = { hello = <span class="string">"world"</span> }
+strict.<span class="global">module</span> (<span class="string">"Awesome_Module"</span>, M, {
+  Lua = <span class="keyword">true</span>,  <span class="comment">-- defines allowed keys
+</span>})
+
+<span class="global">assert</span>(M.hello == <span class="string">"world"</span>)
+<span class="global">assert</span>(M.Lua == <span class="keyword">nil</span>)       <span class="comment">-- access allowed, but has no value yet
+</span>M.Lua = <span class="string">"Rocks"</span>
+<span class="global">assert</span>(M.Lua == <span class="string">"Rocks"</span>)
+M.not_allowed = <span class="string">"bad boy"</span>  <span class="comment">-- throws an error</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "make_all_strict"></a>
+    <strong>make_all_strict (T)</strong>
+    </dt>
+    <dd>
+    make all tables in a table strict.
+ So <code>strict.make_all_strict(_G)</code> prevents monkey-patching
+ of any global table
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">T</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table containing the tables to protect. Table <code>T</code> itself will NOT be protected.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "closed_module"></a>
+    <strong>closed_module (mod, name)</strong>
+    </dt>
+    <dd>
+    make a new module table which is closed to further changes.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">mod</span>
+            <span class="types"><span class="type">tab</span></span>
+         module table
+        </li>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         module name
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.stringio.html b/Data/Libraries/Penlight/docs/libraries/pl.stringio.html
new file mode 100644
index 0000000..7505d34
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.stringio.html
@@ -0,0 +1,215 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><strong>pl.stringio</strong></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.stringio</code></h1>
+<p>Reading and writing strings using file-like objects.</p>
+<p> <br></p>
+
+
+<pre>
+f = stringio.open(text)
+l1 = f:read()  <span class="comment">-- read first line
+</span>n,m = f:read (<span class="string">'*n'</span>,<span class="string">'*n'</span>) <span class="comment">-- read two numbers
+</span><span class="keyword">for</span> line <span class="keyword">in</span> f:lines() <span class="keyword">do</span> <span class="global">print</span>(line) <span class="keyword">end</span> <span class="comment">-- iterate over all lines
+</span>f = stringio.create()
+f:write(<span class="string">'hello'</span>)
+f:write(<span class="string">'dolly'</span>)
+<span class="global">assert</span>(f:value(),<span class="string">'hellodolly'</span>)
+</pre>
+
+<p> See  <a href="../manual/03-strings.md.html#File_style_I_O_on_Strings">the Guide</a>.</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#create">create ()</a></td>
+	<td class="summary">create a file-like object which can be used to construct a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#open">open (s)</a></td>
+	<td class="summary">create a file-like object for reading from a given string.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "create"></a>
+    <strong>create ()</strong>
+    </dt>
+    <dd>
+    create a file-like object which can be used to construct a string.
+ The resulting object has an extra <code>value()</code> method for
+ retrieving the string value.  Implements <a href="../libraries/pl.file.html#write">file:write</a>, <code>file:seek</code>, <code>file:lines</code>,
+ plus an extra <code>writef</code> method which works like <a href="../libraries/pl.utils.html#printf">utils.printf</a>.
+
+
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">f = create(); f:write(<span class="string">'hello, dolly\n'</span>); <span class="global">print</span>(f:value())</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "open"></a>
+    <strong>open (s)</strong>
+    </dt>
+    <dd>
+    create a file-like object for reading from a given string.
+ Implements <a href="../libraries/pl.file.html#read">file:read</a>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         The input string.
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">fs = open <span class="string">'20 10'</span>; x,y = f:read (<span class="string">'*n'</span>,<span class="string">'*n'</span>); <span class="global">assert</span>(x == <span class="number">20</span> <span class="keyword">and</span> y == <span class="number">10</span>)</pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.stringx.html b/Data/Libraries/Penlight/docs/libraries/pl.stringx.html
new file mode 100644
index 0000000..4fd08cd
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.stringx.html
@@ -0,0 +1,1239 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#String_Predicates">String Predicates </a></li>
+<li><a href="#Strings_and_Lists">Strings and Lists </a></li>
+<li><a href="#Finding_and_Replacing">Finding and Replacing </a></li>
+<li><a href="#Stripping_and_Justifying">Stripping and Justifying </a></li>
+<li><a href="#Partioning_Strings">Partioning Strings </a></li>
+<li><a href="#Miscelaneous">Miscelaneous </a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><strong>pl.stringx</strong></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.stringx</code></h1>
+<p>Python-style extended string library.</p>
+<p> see 3.6.1 of the Python reference.
+ If you want to make these available as string methods, then say
+ <code>stringx.import()</code> to bring them into the standard <a href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a> table.</p>
+
+<p> See <a href="../manual/03-strings.md.html#">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a></p>
+
+
+<h2><a href="#String_Predicates">String Predicates </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#isalpha">isalpha (s)</a></td>
+	<td class="summary">does s only contain alphabetic characters?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isdigit">isdigit (s)</a></td>
+	<td class="summary">does s only contain digits?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isalnum">isalnum (s)</a></td>
+	<td class="summary">does s only contain alphanumeric characters?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isspace">isspace (s)</a></td>
+	<td class="summary">does s only contain spaces?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#islower">islower (s)</a></td>
+	<td class="summary">does s only contain lower case characters?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#isupper">isupper (s)</a></td>
+	<td class="summary">does s only contain upper case characters?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#startswith">startswith (s, prefix)</a></td>
+	<td class="summary">does s start with prefix or one of prefixes?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#endswith">endswith (s, suffix)</a></td>
+	<td class="summary">does s end with suffix or one of suffixes?</td>
+	</tr>
+</table>
+<h2><a href="#Strings_and_Lists">Strings and Lists </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#join">join (s, seq)</a></td>
+	<td class="summary">concatenate the strings using this string as a delimiter.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#splitlines">splitlines (s[, keep_ends])</a></td>
+	<td class="summary">Split a string into a list of lines.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#split">split (s[, re[, n]])</a></td>
+	<td class="summary">split a string into a list of strings using a delimiter.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#expandtabs">expandtabs (s, tabsize)</a></td>
+	<td class="summary">replace all tabs in s with tabsize spaces.</td>
+	</tr>
+</table>
+<h2><a href="#Finding_and_Replacing">Finding and Replacing </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#lfind">lfind (s, sub[, first[, last]])</a></td>
+	<td class="summary">find index of first instance of sub in s from the left.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rfind">rfind (s, sub[, first[, last]])</a></td>
+	<td class="summary">find index of first instance of sub in s from the right.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#replace">replace (s, old, new[, n])</a></td>
+	<td class="summary">replace up to n instances of old by new in the string s.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#count">count (s, sub[, allow_overlap])</a></td>
+	<td class="summary">count all instances of substring in string.</td>
+	</tr>
+</table>
+<h2><a href="#Stripping_and_Justifying">Stripping and Justifying </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#ljust">ljust (s, w[, ch=' '])</a></td>
+	<td class="summary">left-justify s with width w.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rjust">rjust (s, w[, ch=' '])</a></td>
+	<td class="summary">right-justify s with width w.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#center">center (s, w[, ch=' '])</a></td>
+	<td class="summary">center-justify s with width w.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#lstrip">lstrip (s[, chrs='%s'])</a></td>
+	<td class="summary">trim any whitespace on the left of s.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rstrip">rstrip (s[, chrs='%s'])</a></td>
+	<td class="summary">trim any whitespace on the right of s.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#strip">strip (s[, chrs='%s'])</a></td>
+	<td class="summary">trim any whitespace on both left and right of s.</td>
+	</tr>
+</table>
+<h2><a href="#Partioning_Strings">Partioning Strings </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#splitv">splitv (s[, re='%s'])</a></td>
+	<td class="summary">split a string using a pattern.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#partition">partition (s, ch)</a></td>
+	<td class="summary">partition the string using first occurance of a delimiter</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rpartition">rpartition (s, ch)</a></td>
+	<td class="summary">partition the string p using last occurance of a delimiter</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#at">at (s, idx)</a></td>
+	<td class="summary">return the 'character' at the index.</td>
+	</tr>
+</table>
+<h2><a href="#Miscelaneous">Miscelaneous </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#lines">lines (s)</a></td>
+	<td class="summary">return an iterator over all lines in a string</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#title">title (s)</a></td>
+	<td class="summary">inital word letters uppercase ('title case').</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#shorten">shorten (s, w, tail)</a></td>
+	<td class="summary">Return a shortened version of a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#quote_string">quote_string (s)</a></td>
+	<td class="summary">Quote the given string and preserve any control or escape characters, such that reloading the string in Lua returns the same result.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="String_Predicates"></a>String Predicates </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "isalpha"></a>
+    <strong>isalpha (s)</strong>
+    </dt>
+    <dd>
+    does s only contain alphabetic characters?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isdigit"></a>
+    <strong>isdigit (s)</strong>
+    </dt>
+    <dd>
+    does s only contain digits?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isalnum"></a>
+    <strong>isalnum (s)</strong>
+    </dt>
+    <dd>
+    does s only contain alphanumeric characters?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isspace"></a>
+    <strong>isspace (s)</strong>
+    </dt>
+    <dd>
+    does s only contain spaces?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "islower"></a>
+    <strong>islower (s)</strong>
+    </dt>
+    <dd>
+    does s only contain lower case characters?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "isupper"></a>
+    <strong>isupper (s)</strong>
+    </dt>
+    <dd>
+    does s only contain upper case characters?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "startswith"></a>
+    <strong>startswith (s, prefix)</strong>
+    </dt>
+    <dd>
+    does s start with prefix or one of prefixes?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+        <li><span class="parameter">prefix</span>
+         a string or an array of strings
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "endswith"></a>
+    <strong>endswith (s, suffix)</strong>
+    </dt>
+    <dd>
+    does s end with suffix or one of suffixes?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a string
+        </li>
+        <li><span class="parameter">suffix</span>
+         a string or an array of strings
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Strings_and_Lists"></a>Strings and Lists </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "join"></a>
+    <strong>join (s, seq)</strong>
+    </dt>
+    <dd>
+    concatenate the strings using this string as a delimiter.
+ Note that the arguments are reversed from <code>string.concat</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">seq</span>
+         a table of strings or numbers
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">stringx.join(<span class="string">' '</span>, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}) == <span class="string">'1 2 3'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "splitlines"></a>
+    <strong>splitlines (s[, keep_ends])</strong>
+    </dt>
+    <dd>
+    Split a string into a list of lines.
+ <code>&quot;\r&quot;</code>, <code>&quot;\n&quot;</code>, and <code>&quot;\r\n&quot;</code> are considered line ends.
+ They are not included in the lines unless <code>keepends</code> is passed.
+ Terminal line end does not produce an extra line.
+ Splitting an empty string results in an empty list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string.
+        </li>
+        <li><span class="parameter">keep_ends</span>
+            <span class="types"><span class="type">bool</span></span>
+         include line ends.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        List of lines
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "split"></a>
+    <strong>split (s[, re[, n]])</strong>
+    </dt>
+    <dd>
+    split a string into a list of strings using a delimiter.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">re</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a delimiter (defaults to whitespace)
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">n</span>
+            <span class="types"><span class="type">int</span></span>
+         maximum number of results
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        List
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">#(stringx.split(<span class="string">'one two'</span>)) == <span class="number">2</span></pre></li>
+        <li><pre class="example">stringx.split(<span class="string">'one,two,three'</span>, <span class="string">','</span>) == List{<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>}</pre></li>
+        <li><pre class="example">stringx.split(<span class="string">'one,two,three'</span>, <span class="string">','</span>, <span class="number">2</span>) == List{<span class="string">'one'</span>,<span class="string">'two,three'</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "expandtabs"></a>
+    <strong>expandtabs (s, tabsize)</strong>
+    </dt>
+    <dd>
+    replace all tabs in s with tabsize spaces.  If not specified, tabsize defaults to 8.
+ Tab stops will be honored.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">tabsize</span>
+            <span class="types"><span class="type">int</span></span>
+        [opt=8] number of spaces to expand each tab
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        expanded string
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">stringx.expandtabs(<span class="string">'\tone,two,three'</span>, <span class="number">4</span>)   == <span class="string">'    one,two,three'</span></pre></li>
+        <li><pre class="example">stringx.expandtabs(<span class="string">'  \tone,two,three'</span>, <span class="number">4</span>) == <span class="string">'    one,two,three'</span></pre></li>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Finding_and_Replacing"></a>Finding and Replacing </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "lfind"></a>
+    <strong>lfind (s, sub[, first[, last]])</strong>
+    </dt>
+    <dd>
+    find index of first instance of sub in s from the left.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">sub</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         substring
+        </li>
+        <li><span class="parameter">first</span>
+            <span class="types"><span class="type">int</span></span>
+         first index
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">last</span>
+            <span class="types"><span class="type">int</span></span>
+         last index
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        start index, or nil if not found
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "rfind"></a>
+    <strong>rfind (s, sub[, first[, last]])</strong>
+    </dt>
+    <dd>
+    find index of first instance of sub in s from the right.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">sub</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         substring
+        </li>
+        <li><span class="parameter">first</span>
+            <span class="types"><span class="type">int</span></span>
+         first index
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">last</span>
+            <span class="types"><span class="type">int</span></span>
+         last index
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        start index, or nil if not found
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "replace"></a>
+    <strong>replace (s, old, new[, n])</strong>
+    </dt>
+    <dd>
+    replace up to n instances of old by new in the string s.
+ If n is not present, replace all instances.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">old</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the target substring
+        </li>
+        <li><span class="parameter">new</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the substitution
+        </li>
+        <li><span class="parameter">n</span>
+            <span class="types"><span class="type">int</span></span>
+         optional maximum number of substitutions
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        result string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "count"></a>
+    <strong>count (s, sub[, allow_overlap])</strong>
+    </dt>
+    <dd>
+    count all instances of substring in string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">sub</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         substring
+        </li>
+        <li><span class="parameter">allow_overlap</span>
+            <span class="types"><span class="type">bool</span></span>
+         allow matches to overlap
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="global">assert</span>(stringx.count(<span class="string">'banana'</span>, <span class="string">'ana'</span>) == <span class="number">1</span>)
+<span class="global">assert</span>(stringx.count(<span class="string">'banana'</span>, <span class="string">'ana'</span>, <span class="keyword">true</span>) == <span class="number">2</span>)</pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Stripping_and_Justifying"></a>Stripping and Justifying </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "ljust"></a>
+    <strong>ljust (s, w[, ch=' '])</strong>
+    </dt>
+    <dd>
+    left-justify s with width w.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">w</span>
+            <span class="types"><span class="type">int</span></span>
+         width of justification
+        </li>
+        <li><span class="parameter">ch</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         padding character
+         (<em>default</em> ' ')
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">stringx.ljust(<span class="string">'hello'</span>, <span class="number">10</span>, <span class="string">'*'</span>) == <span class="string">'*****hello'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "rjust"></a>
+    <strong>rjust (s, w[, ch=' '])</strong>
+    </dt>
+    <dd>
+    right-justify s with width w.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">w</span>
+            <span class="types"><span class="type">int</span></span>
+         width of justification
+        </li>
+        <li><span class="parameter">ch</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         padding character
+         (<em>default</em> ' ')
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">stringx.rjust(<span class="string">'hello'</span>, <span class="number">10</span>, <span class="string">'*'</span>) == <span class="string">'hello*****'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "center"></a>
+    <strong>center (s, w[, ch=' '])</strong>
+    </dt>
+    <dd>
+    center-justify s with width w.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">w</span>
+            <span class="types"><span class="type">int</span></span>
+         width of justification
+        </li>
+        <li><span class="parameter">ch</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         padding character
+         (<em>default</em> ' ')
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">stringx.center(<span class="string">'hello'</span>, <span class="number">10</span>, <span class="string">'*'</span>) == <span class="string">'**hello***'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "lstrip"></a>
+    <strong>lstrip (s[, chrs='%s'])</strong>
+    </dt>
+    <dd>
+    trim any whitespace on the left of s.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">chrs</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         default any whitespace character,
+  but can be a string of characters to be trimmed
+         (<em>default</em> '%s')
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "rstrip"></a>
+    <strong>rstrip (s[, chrs='%s'])</strong>
+    </dt>
+    <dd>
+    trim any whitespace on the right of s.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">chrs</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         default any whitespace character,
+  but can be a string of characters to be trimmed
+         (<em>default</em> '%s')
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "strip"></a>
+    <strong>strip (s[, chrs='%s'])</strong>
+    </dt>
+    <dd>
+    trim any whitespace on both left and right of s.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">chrs</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         default any whitespace character,
+  but can be a string of characters to be trimmed
+         (<em>default</em> '%s')
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Partioning_Strings"></a>Partioning Strings </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "splitv"></a>
+    <strong>splitv (s[, re='%s'])</strong>
+    </dt>
+    <dd>
+    split a string using a pattern.  Note that at least one value will be returned!
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">re</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a Lua string pattern (defaults to whitespace)
+         (<em>default</em> '%s')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the parts of the string
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#splitv">utils.splitv</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">a,b = line:splitv(<span class="string">'='</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "partition"></a>
+    <strong>partition (s, ch)</strong>
+    </dt>
+    <dd>
+    partition the string using first occurance of a delimiter
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">ch</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         delimiter
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        part before ch</li>
+        <li>
+        ch</li>
+        <li>
+        part after ch</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">{stringx.partition(<span class="string">'a,b,c'</span>, <span class="string">','</span>))} == {<span class="string">'a'</span>, <span class="string">','</span>, <span class="string">'b,c'</span>}</pre></li>
+        <li><pre class="example">{stringx.partition(<span class="string">'abc'</span>, <span class="string">'x'</span>))} == {<span class="string">'abc'</span>, <span class="string">''</span>, <span class="string">''</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "rpartition"></a>
+    <strong>rpartition (s, ch)</strong>
+    </dt>
+    <dd>
+    partition the string p using last occurance of a delimiter
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">ch</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         delimiter
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        part before ch</li>
+        <li>
+        ch</li>
+        <li>
+        part after ch</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">{stringx.rpartition(<span class="string">'a,b,c'</span>, <span class="string">','</span>))} == {<span class="string">'a,b'</span>, <span class="string">','</span>, <span class="string">'c'</span>}</pre></li>
+        <li><pre class="example">{stringx.rpartition(<span class="string">'abc'</span>, <span class="string">'x'</span>))} == {<span class="string">''</span>, <span class="string">''</span>, <span class="string">'abc'</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "at"></a>
+    <strong>at (s, idx)</strong>
+    </dt>
+    <dd>
+    return the 'character' at the index.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">idx</span>
+            <span class="types"><span class="type">int</span></span>
+         an index (can be negative)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a substring of length 1 if successful, empty string otherwise.
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Miscelaneous"></a>Miscelaneous </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "lines"></a>
+    <strong>lines (s)</strong>
+    </dt>
+    <dd>
+    return an iterator over all lines in a string
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> line_no = <span class="number">1</span>
+<span class="keyword">for</span> line <span class="keyword">in</span> stringx.lines(some_text) <span class="keyword">do</span>
+  <span class="global">print</span>(line_no, line)
+  line_no = line_no + <span class="number">1</span>
+<span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "title"></a>
+    <strong>title (s)</strong>
+    </dt>
+    <dd>
+    inital word letters uppercase ('title case').
+ Here 'words' mean chunks of non-space characters.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string with each word's first letter uppercase
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">stringx.title(<span class="string">"hello world"</span>) == <span class="string">"Hello World"</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "shorten"></a>
+    <strong>shorten (s, w, tail)</strong>
+    </dt>
+    <dd>
+    Return a shortened version of a string.
+ Fits string within w characters. Removed characters are marked with ellipsis.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">w</span>
+            <span class="types"><span class="type">int</span></span>
+         the maxinum size allowed
+        </li>
+        <li><span class="parameter">tail</span>
+            <span class="types"><span class="type">bool</span></span>
+         true if we want to show the end of the string (head otherwise)
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">(<span class="string">'1234567890'</span>):shorten(<span class="number">8</span>) == <span class="string">'12345...'</span></pre></li>
+        <li><pre class="example">(<span class="string">'1234567890'</span>):shorten(<span class="number">8</span>, <span class="keyword">true</span>) == <span class="string">'...67890'</span></pre></li>
+        <li><pre class="example">(<span class="string">'1234567890'</span>):shorten(<span class="number">20</span>) == <span class="string">'1234567890'</span></pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "quote_string"></a>
+    <strong>quote_string (s)</strong>
+    </dt>
+    <dd>
+    Quote the given string and preserve any control or escape characters, such that reloading the string in Lua returns the same result.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         The string to be quoted.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        The quoted string.
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.tablex.html b/Data/Libraries/Penlight/docs/libraries/pl.tablex.html
new file mode 100644
index 0000000..2e07080
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.tablex.html
@@ -0,0 +1,1980 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Copying">Copying</a></li>
+<li><a href="#Comparing">Comparing</a></li>
+<li><a href="#Finding">Finding</a></li>
+<li><a href="#MappingAndFiltering">MappingAndFiltering</a></li>
+<li><a href="#Iterating">Iterating</a></li>
+<li><a href="#Extraction">Extraction</a></li>
+<li><a href="#Merging">Merging</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><strong>pl.tablex</strong></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.tablex</code></h1>
+<p>Extended operations on Lua tables.</p>
+<p> See <a href="../manual/02-arrays.md.html#Useful_Operations_on_Tables">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.types.html#">pl.types</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#size">size (t)</a></td>
+	<td class="summary">total number of elements in this table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#index_by">index_by (tbl, idx)</a></td>
+	<td class="summary">return a list of all values in a table indexed by another list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#transform">transform (fun, t, ...)</a></td>
+	<td class="summary">apply a function to all values of a table, in-place.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#range">range (start, finish[, step=1])</a></td>
+	<td class="summary">generate a table of all numbers in a range.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#reduce">reduce (fun, t, memo)</a></td>
+	<td class="summary">'reduce' a list using a binary function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#index_map">index_map (t)</a></td>
+	<td class="summary">create an index map from a list-like table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#makeset">makeset (t)</a></td>
+	<td class="summary">create a set from a list-like table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#union">union (t1, t2)</a></td>
+	<td class="summary">the union of two map-like tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#intersection">intersection (t1, t2)</a></td>
+	<td class="summary">the intersection of two map-like tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#count_map">count_map (t, cmp)</a></td>
+	<td class="summary">A table where the key/values are the values and value counts of the table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#set">set (t, val[, i1=1[, i2=#t]])</a></td>
+	<td class="summary">set an array range to a value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#new">new (n, val)</a></td>
+	<td class="summary">create a new array of specified size with initial value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#clear">clear (t, istart)</a></td>
+	<td class="summary">clear out the contents of a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#removevalues">removevalues (t, i1, i2)</a></td>
+	<td class="summary">remove a range of values from a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#readonly">readonly (t)</a></td>
+	<td class="summary">modifies a table to be read only.</td>
+	</tr>
+</table>
+<h2><a href="#Copying">Copying</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#update">update (t1, t2)</a></td>
+	<td class="summary">copy a table into another, in-place.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#copy">copy (t)</a></td>
+	<td class="summary">make a shallow copy of a table</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#deepcopy">deepcopy (t)</a></td>
+	<td class="summary">make a deep copy of a table, recursively copying all the keys and fields.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#icopy">icopy (dest, src[, idest=1[, isrc=1[, nsrc=#src]]])</a></td>
+	<td class="summary">copy an array into another one, clearing <code>dest</code> after <code>idest+nsrc</code>, if necessary.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#move">move (dest, src[, idest=1[, isrc=1[, nsrc=#src]]])</a></td>
+	<td class="summary">copy an array into another one.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#insertvalues">insertvalues (t[, position], values)</a></td>
+	<td class="summary">insert values into a table.</td>
+	</tr>
+</table>
+<h2><a href="#Comparing">Comparing</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#deepcompare">deepcompare (t1, t2[, ignore_mt[, eps]])</a></td>
+	<td class="summary">compare two values.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compare">compare (t1, t2, cmp)</a></td>
+	<td class="summary">compare two arrays using a predicate.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compare_no_order">compare_no_order (t1, t2, cmp)</a></td>
+	<td class="summary">compare two list-like tables using an optional predicate, without regard for element order.</td>
+	</tr>
+</table>
+<h2><a href="#Finding">Finding</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#find">find (t, val, idx)</a></td>
+	<td class="summary">return the index of a value in a list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#rfind">rfind (t, val, idx)</a></td>
+	<td class="summary">return the index of a value in a list, searching from the end.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#find_if">find_if (t, cmp, arg)</a></td>
+	<td class="summary">return the index (or key) of a value in a table using a comparison function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#search">search (t, value[, exclude])</a></td>
+	<td class="summary">find a value in a table by recursive search.</td>
+	</tr>
+</table>
+<h2><a href="#MappingAndFiltering">MappingAndFiltering</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#map">map (fun, t, ...)</a></td>
+	<td class="summary">apply a function to all values of a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#imap">imap (fun, t, ...)</a></td>
+	<td class="summary">apply a function to all values of a list.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map_named_method">map_named_method (name, t, ...)</a></td>
+	<td class="summary">apply a named method to values from a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#map2">map2 (fun, t1, t2, ...)</a></td>
+	<td class="summary">apply a function to values from two tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#imap2">imap2 (fun, t1, t2, ...)</a></td>
+	<td class="summary">apply a function to values from two arrays.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#mapn">mapn (fun, ..., fun)</a></td>
+	<td class="summary">Apply a function to a number of tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#pairmap">pairmap (fun, t, ...)</a></td>
+	<td class="summary">call the function with the key and value pairs from a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#filter">filter (t, pred, arg)</a></td>
+	<td class="summary">filter an array's values using a predicate function</td>
+	</tr>
+</table>
+<h2><a href="#Iterating">Iterating</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#foreach">foreach (t, fun, ...)</a></td>
+	<td class="summary">apply a function to all elements of a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#foreachi">foreachi (t, fun, ...)</a></td>
+	<td class="summary">apply a function to all elements of a list-like table in order.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sort">sort (t, f)</a></td>
+	<td class="summary">return an iterator to a table sorted by its keys</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sortv">sortv (t, f)</a></td>
+	<td class="summary">return an iterator to a table sorted by its values</td>
+	</tr>
+</table>
+<h2><a href="#Extraction">Extraction</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#keys">keys (t)</a></td>
+	<td class="summary">return all the keys of a table in arbitrary order.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#values">values (t)</a></td>
+	<td class="summary">return all the values of the table in arbitrary order</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#sub">sub (t, first, last)</a></td>
+	<td class="summary">Extract a range from a table, like  'string.sub'.</td>
+	</tr>
+</table>
+<h2><a href="#Merging">Merging</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#merge">merge (t1, t2, dup)</a></td>
+	<td class="summary">combine two tables, either as union or intersection.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#difference">difference (s1, s2, symm)</a></td>
+	<td class="summary">a new table which is the difference of two tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#zip">zip (...)</a></td>
+	<td class="summary">return a table where each element is a table of the ith values of an arbitrary
+ number of tables.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "size"></a>
+    <strong>size (t)</strong>
+    </dt>
+    <dd>
+    total number of elements in this table.
+ Note that this is distinct from <code>#t</code>, which is the number
+ of values in the array part; this value will always
+ be greater or equal. The difference gives the size of
+ the hash part, for practical purposes. Works for any
+ object with a __pairs metamethod.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the size
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "index_by"></a>
+    <strong>index_by (tbl, idx)</strong>
+    </dt>
+    <dd>
+    return a list of all values in a table indexed by another list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tbl</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">idx</span>
+            <span class="types"><span class="type">array</span></span>
+         an index table (a list of keys)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list-like table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">index_by({<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>},{<span class="number">2</span>,<span class="number">4</span>}) == {<span class="number">20</span>,<span class="number">40</span>}</pre></li>
+        <li><pre class="example">index_by({one=<span class="number">1</span>,two=<span class="number">2</span>,three=<span class="number">3</span>},{<span class="string">'one'</span>,<span class="string">'three'</span>}) == {<span class="number">1</span>,<span class="number">3</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "transform"></a>
+    <strong>transform (fun, t, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to all values of a table, in-place.
+ Any extra arguments are passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         A function that takes at least one argument
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments passed to <code>fun</code>
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#foreach">tablex.foreach</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "range"></a>
+    <strong>range (start, finish[, step=1])</strong>
+    </dt>
+    <dd>
+    generate a table of all numbers in a range.
+ This is consistent with a numerical for loop.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">start</span>
+            <span class="types"><span class="type">int</span></span>
+          number
+        </li>
+        <li><span class="parameter">finish</span>
+            <span class="types"><span class="type">int</span></span>
+         number
+        </li>
+        <li><span class="parameter">step</span>
+            <span class="types"><span class="type">int</span></span>
+          make this negative for start &lt; finish
+         (<em>default</em> 1)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "reduce"></a>
+    <strong>reduce (fun, t, memo)</strong>
+    </dt>
+    <dd>
+    'reduce' a list using a binary function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of two arguments
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">memo</span>
+            <span class="types"><span class="type">array</span></span>
+         optional initial memo value. Defaults to first value in table.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the result of the function
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">reduce(<span class="string">'+'</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>}) == <span class="number">10</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "index_map"></a>
+    <strong>index_map (t)</strong>
+    </dt>
+    <dd>
+    create an index map from a list-like table.  The original values become keys,
+ and the associated values are the indices into the original list.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a map-like table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "makeset"></a>
+    <strong>makeset (t)</strong>
+    </dt>
+    <dd>
+    create a set from a list-like table.  A set is a table where the original values
+ become keys, and the associated values are all true.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a set (a map-like table)
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "union"></a>
+    <strong>union (t1, t2)</strong>
+    </dt>
+    <dd>
+    the union of two map-like tables.
+ If there are duplicate keys, the second table wins.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><span class="type">tab</span></span>
+
+
+
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#merge">tablex.merge</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "intersection"></a>
+    <strong>intersection (t1, t2)</strong>
+    </dt>
+    <dd>
+    the intersection of two map-like tables.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+           <span class="types"><span class="type">tab</span></span>
+
+
+
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#merge">tablex.merge</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "count_map"></a>
+    <strong>count_map (t, cmp)</strong>
+    </dt>
+    <dd>
+    A table where the key/values are the values and value counts of the table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         a function that defines equality (otherwise uses ==)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a map-like table
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.seq.html#count_map">seq.count_map</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "set"></a>
+    <strong>set (t, val[, i1=1[, i2=#t]])</strong>
+    </dt>
+    <dd>
+    set an array range to a value.  If it's a function we use the result
+ of applying it to the indices.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">val</span>
+         a value
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start range
+         (<em>default</em> 1)
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end range
+         (<em>default</em> #t)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "new"></a>
+    <strong>new (n, val)</strong>
+    </dt>
+    <dd>
+    create a new array of specified size with initial value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">n</span>
+            <span class="types"><span class="type">int</span></span>
+         size
+        </li>
+        <li><span class="parameter">val</span>
+         initial value (can be <code>nil</code>, but don't expect <code>#</code> to work!)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "clear"></a>
+    <strong>clear (t, istart)</strong>
+    </dt>
+    <dd>
+    clear out the contents of a table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list
+        </li>
+        <li><span class="parameter">istart</span>
+         optional start position
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "removevalues"></a>
+    <strong>removevalues (t, i1, i2)</strong>
+    </dt>
+    <dd>
+    remove a range of values from a table.
+ End of range may be negative.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">i1</span>
+            <span class="types"><span class="type">int</span></span>
+         start index
+        </li>
+        <li><span class="parameter">i2</span>
+            <span class="types"><span class="type">int</span></span>
+         end index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "readonly"></a>
+    <strong>readonly (t)</strong>
+    </dt>
+    <dd>
+    modifies a table to be read only.
+ This only offers weak protection. Tables can still be modified with
+ <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.insert">table.insert</a> and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-rawset">rawset</a>.</p>
+
+<p> <em>NOTE</em>: for Lua 5.1 length, pairs and ipairs will not work, since the
+ equivalent metamethods are only available in Lua 5.2 and newer.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the table read only (a proxy).
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Copying"></a>Copying</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "update"></a>
+    <strong>update (t1, t2)</strong>
+    </dt>
+    <dd>
+    copy a table into another, in-place.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">tab</span></span>
+         destination table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">tab</span></span>
+         source (actually any iterable object)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        first table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "copy"></a>
+    <strong>copy (t)</strong>
+    </dt>
+    <dd>
+    make a shallow copy of a table
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         an iterable source
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        new table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "deepcopy"></a>
+    <strong>deepcopy (t)</strong>
+    </dt>
+    <dd>
+    make a deep copy of a table, recursively copying all the keys and fields.
+ This supports cycles in tables; cycles will be reproduced in the copy.
+ This will also set the copied table's metatable to that of the original.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        new table
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "icopy"></a>
+    <strong>icopy (dest, src[, idest=1[, isrc=1[, nsrc=#src]]])</strong>
+    </dt>
+    <dd>
+    copy an array into another one, clearing <code>dest</code> after <code>idest+nsrc</code>, if necessary.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">dest</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">src</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">idest</span>
+            <span class="types"><span class="type">int</span></span>
+         where to start copying values into destination
+         (<em>default</em> 1)
+        </li>
+        <li><span class="parameter">isrc</span>
+            <span class="types"><span class="type">int</span></span>
+         where to start copying values from source
+         (<em>default</em> 1)
+        </li>
+        <li><span class="parameter">nsrc</span>
+            <span class="types"><span class="type">int</span></span>
+         number of elements to copy from source
+         (<em>default</em> #src)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "move"></a>
+    <strong>move (dest, src[, idest=1[, isrc=1[, nsrc=#src]]])</strong>
+    </dt>
+    <dd>
+    copy an array into another one.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">dest</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">src</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">idest</span>
+            <span class="types"><span class="type">int</span></span>
+         where to start copying values into destination
+         (<em>default</em> 1)
+        </li>
+        <li><span class="parameter">isrc</span>
+            <span class="types"><span class="type">int</span></span>
+         where to start copying values from source
+         (<em>default</em> 1)
+        </li>
+        <li><span class="parameter">nsrc</span>
+            <span class="types"><span class="type">int</span></span>
+         number of elements to copy from source
+         (<em>default</em> #src)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "insertvalues"></a>
+    <strong>insertvalues (t[, position], values)</strong>
+    </dt>
+    <dd>
+    insert values into a table.
+ similar to <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.insert">table.insert</a> but inserts values from given table <a href="../libraries/pl.tablex.html#values">values</a>,
+ not the object itself, into table <code>t</code> at position <code>pos</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         the list
+        </li>
+        <li><span class="parameter">position</span>
+            <span class="types"><span class="type">int</span></span>
+         (default is at end)
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">values</span>
+            <span class="types"><span class="type">array</span></span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Comparing"></a>Comparing</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "deepcompare"></a>
+    <strong>deepcompare (t1, t2[, ignore_mt[, eps]])</strong>
+    </dt>
+    <dd>
+    compare two values.
+ if they are tables, then compare their keys and fields recursively.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+         A value
+        </li>
+        <li><span class="parameter">t2</span>
+         A value
+        </li>
+        <li><span class="parameter">ignore_mt</span>
+            <span class="types"><span class="type">bool</span></span>
+         if true, ignore __eq metamethod (default false)
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">eps</span>
+            <span class="types"><span class="type">number</span></span>
+         if defined, then used for any number comparisons
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "compare"></a>
+    <strong>compare (t1, t2, cmp)</strong>
+    </dt>
+    <dd>
+    compare two arrays using a predicate.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">array</span></span>
+         an array
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">array</span></span>
+         an array
+        </li>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         A comparison function; <code>bool = cmp(t1_value, t2_value)</code>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true or false
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="global">assert</span>(tablex.compare({ <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span> }, { <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span> }, <span class="string">"=="</span>))
+
+<span class="global">assert</span>(tablex.compare(
+   {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>, hello = <span class="string">"world"</span>},  <span class="comment">-- fields are not compared!
+</span>   {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}, <span class="keyword">function</span>(v1, v2) <span class="keyword">return</span> v1 == v2 <span class="keyword">end</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "compare_no_order"></a>
+    <strong>compare_no_order (t1, t2, cmp)</strong>
+    </dt>
+    <dd>
+    compare two list-like tables using an optional predicate, without regard for element order.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">cmp</span>
+         A comparison function (may be nil)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Finding"></a>Finding</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "find"></a>
+    <strong>find (t, val, idx)</strong>
+    </dt>
+    <dd>
+    return the index of a value in a list.
+ Like string.find, there is an optional index to start searching,
+ which can be negative.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         A list-like table
+        </li>
+        <li><span class="parameter">val</span>
+         A value
+        </li>
+        <li><span class="parameter">idx</span>
+            <span class="types"><span class="type">int</span></span>
+         index to start; -1 means last element,etc (default 1)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        index of value or nil if not found
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">find({<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>},<span class="number">20</span>) == <span class="number">2</span></pre></li>
+        <li><pre class="example">find({<span class="string">'a'</span>,<span class="string">'b'</span>,<span class="string">'a'</span>,<span class="string">'c'</span>},<span class="string">'a'</span>,<span class="number">2</span>) == <span class="number">3</span></pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "rfind"></a>
+    <strong>rfind (t, val, idx)</strong>
+    </dt>
+    <dd>
+    return the index of a value in a list, searching from the end.
+ Like string.find, there is an optional index to start searching,
+ which can be negative.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         A list-like table
+        </li>
+        <li><span class="parameter">val</span>
+         A value
+        </li>
+        <li><span class="parameter">idx</span>
+         index to start; -1 means last element,etc (default <code>#t</code>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        index of value or nil if not found
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">rfind({<span class="number">10</span>,<span class="number">10</span>,<span class="number">10</span>},<span class="number">10</span>) == <span class="number">3</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "find_if"></a>
+    <strong>find_if (t, cmp, arg)</strong>
+    </dt>
+    <dd>
+    return the index (or key) of a value in a table using a comparison function. </p>
+
+<p> <em>NOTE</em>: the 2nd return value of this function, the value returned
+ by the comparison function, has a limitation that it cannot be <code>false</code>.
+ Because if it is, then it indicates the comparison failed, and the
+ function will continue the search. See examples.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+        <li><span class="parameter">cmp</span>
+            <span class="types"><span class="type">func</span></span>
+         A comparison function
+        </li>
+        <li><span class="parameter">arg</span>
+         an optional second argument to the function
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        index of value, or nil if not found</li>
+        <li>
+        value returned by comparison function (cannot be <code>false</code>!)</li>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- using an operator
+</span><span class="keyword">local</span> lst = { <span class="string">"Rudolph"</span>, <span class="keyword">true</span>, <span class="keyword">false</span>, <span class="number">15</span> }
+<span class="keyword">local</span> idx, cmp_result = tablex.rfind(lst, <span class="string">"=="</span>, <span class="string">"Rudolph"</span>)
+<span class="global">assert</span>(idx == <span class="number">1</span>)
+<span class="global">assert</span>(cmp_result == <span class="keyword">true</span>)
+
+<span class="keyword">local</span> idx, cmp_result = tablex.rfind(lst, <span class="string">"=="</span>, <span class="keyword">false</span>)
+<span class="global">assert</span>(idx == <span class="number">3</span>)
+<span class="global">assert</span>(cmp_result == <span class="keyword">true</span>)       <span class="comment">-- looking up 'false' works!
+</span>
+<span class="comment">-- using a function returning the value looked up
+</span><span class="keyword">local</span> cmp = <span class="keyword">function</span>(v1, v2) <span class="keyword">return</span> v1 == v2 <span class="keyword">and</span> v2 <span class="keyword">end</span>
+<span class="keyword">local</span> idx, cmp_result = tablex.rfind(lst, cmp, <span class="string">"Rudolph"</span>)
+<span class="global">assert</span>(idx == <span class="number">1</span>)
+<span class="global">assert</span>(cmp_result == <span class="string">"Rudolph"</span>)  <span class="comment">-- the value is returned
+</span>
+<span class="comment">-- NOTE: this fails, since 'false' cannot be returned!
+</span><span class="keyword">local</span> idx, cmp_result = tablex.rfind(lst, cmp, <span class="keyword">false</span>)
+<span class="global">assert</span>(idx == <span class="keyword">nil</span>)               <span class="comment">-- looking up 'false' failed!
+</span><span class="global">assert</span>(cmp_result == <span class="keyword">nil</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "search"></a>
+    <strong>search (t, value[, exclude])</strong>
+    </dt>
+    <dd>
+    find a value in a table by recursive search.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table
+        </li>
+        <li><span class="parameter">value</span>
+         the value
+        </li>
+        <li><span class="parameter">exclude</span>
+            <span class="types"><span class="type">array</span></span>
+         any tables to avoid searching
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a fieldspec, e.g. 'a.b' or 'math.sin'
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">search(_G,<span class="global">math</span>.sin,{<span class="global">package</span>.path}) == <span class="string">'math.sin'</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="MappingAndFiltering"></a>MappingAndFiltering</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "map"></a>
+    <strong>map (fun, t, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to all values of a table.
+ This returns a table of the results.
+ Any extra arguments are passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         A function that takes at least one argument
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+        <li><span class="parameter">...</span>
+         optional arguments
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">map(<span class="keyword">function</span>(v) <span class="keyword">return</span> v*v <span class="keyword">end</span>, {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,fred=<span class="number">2</span>}) is {<span class="number">100</span>,<span class="number">400</span>,<span class="number">900</span>,fred=<span class="number">4</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "imap"></a>
+    <strong>imap (fun, t, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to all values of a list.
+ This returns a table of the results.
+ Any extra arguments are passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         A function that takes at least one argument
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a table (applies to array part)
+        </li>
+        <li><span class="parameter">...</span>
+         optional arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list-like table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">imap(<span class="keyword">function</span>(v) <span class="keyword">return</span> v*v <span class="keyword">end</span>, {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,fred=<span class="number">2</span>}) is {<span class="number">100</span>,<span class="number">400</span>,<span class="number">900</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "map_named_method"></a>
+    <strong>map_named_method (name, t, ...)</strong>
+    </dt>
+    <dd>
+    apply a named method to values from a table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">name</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the method name
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">...</span>
+         any extra arguments to the method
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a <a href="../classes/pl.List.html">List</a> with the results of the method (1st result only)
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> Car = {}
+Car.__index = Car
+<span class="keyword">function</span> Car.new(car)
+  <span class="keyword">return</span> <span class="global">setmetatable</span>(car <span class="keyword">or</span> {}, Car)
+<span class="keyword">end</span>
+Car.speed = <span class="number">0</span>
+<span class="keyword">function</span> Car:faster(increase)
+  self.speed = self.speed + increase
+  <span class="keyword">return</span> self.speed
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> ferrari = Car.new{ name = <span class="string">"Ferrari"</span> }
+<span class="keyword">local</span> lamborghini = Car.new{ name = <span class="string">"Lamborghini"</span>, speed = <span class="number">50</span> }
+<span class="keyword">local</span> cars = { ferrari, lamborghini }
+
+<span class="global">assert</span>(ferrari.speed == <span class="number">0</span>)
+<span class="global">assert</span>(lamborghini.speed == <span class="number">50</span>)
+tablex.map_named_method(<span class="string">"faster"</span>, cars, <span class="number">10</span>)
+<span class="global">assert</span>(ferrari.speed == <span class="number">10</span>)
+<span class="global">assert</span>(lamborghini.speed == <span class="number">60</span>)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "map2"></a>
+    <strong>map2 (fun, t1, t2, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to values from two tables.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least two arguments
+        </li>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">map2(<span class="string">'+'</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,m=<span class="number">4</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,m=<span class="number">40</span>}) is {<span class="number">11</span>,<span class="number">22</span>,<span class="number">23</span>,m=<span class="number">44</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "imap2"></a>
+    <strong>imap2 (fun, t1, t2, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to values from two arrays.
+ The result will be the length of the shortest array.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function of at least two arguments
+        </li>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">imap2(<span class="string">'+'</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,m=<span class="number">4</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,m=<span class="number">40</span>}) is {<span class="number">11</span>,<span class="number">22</span>,<span class="number">23</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "mapn"></a>
+    <strong>mapn (fun, ..., fun)</strong>
+    </dt>
+    <dd>
+    Apply a function to a number of tables.
+ A more general version of map
+ The result is a table containing the result of applying that function to the
+ ith value of each table. Length of output list is the minimum length of all the lists
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+         A function that takes as many arguments as there are tables
+        </li>
+        <li><span class="parameter">...</span>
+            <span class="types"><span class="type">tab</span></span>
+         n tables
+        </li>
+        <li><span class="parameter">fun</span>
+         A function that takes as many arguments as there are tables
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">mapn(<span class="keyword">function</span>(x,y,z) <span class="keyword">return</span> x+y+z <span class="keyword">end</span>, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>},{<span class="number">100</span>,<span class="number">200</span>,<span class="number">300</span>}) is {<span class="number">111</span>,<span class="number">222</span>,<span class="number">333</span>}</pre></li>
+        <li><pre class="example">mapn(<span class="global">math</span>.max, {<span class="number">1</span>,<span class="number">20</span>,<span class="number">300</span>},{<span class="number">10</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">100</span>,<span class="number">200</span>,<span class="number">100</span>}) is    {<span class="number">100</span>,<span class="number">200</span>,<span class="number">300</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "pairmap"></a>
+    <strong>pairmap (fun, t, ...)</strong>
+    </dt>
+    <dd>
+    call the function with the key and value pairs from a table.
+ The function can return a value and a key (note the order!). If both
+ are not nil, then this pair is inserted into the result: if the key already exists, we convert the value for that
+ key into a table and append into it. If only value is not nil, then it is appended to the result.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         A function which will be passed each key and value as arguments, plus any extra arguments to pairmap.
+        </li>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+        <li><span class="parameter">...</span>
+         optional arguments
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">pairmap(<span class="keyword">function</span>(k,v) <span class="keyword">return</span> v <span class="keyword">end</span>,{fred=<span class="number">10</span>,bonzo=<span class="number">20</span>}) is {<span class="number">10</span>,<span class="number">20</span>} _or_ {<span class="number">20</span>,<span class="number">10</span>}</pre></li>
+        <li><pre class="example">pairmap(<span class="keyword">function</span>(k,v) <span class="keyword">return</span> {k,v},k <span class="keyword">end</span>,{one=<span class="number">1</span>,two=<span class="number">2</span>}) is {one={<span class="string">'one'</span>,<span class="number">1</span>},two={<span class="string">'two'</span>,<span class="number">2</span>}}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "filter"></a>
+    <strong>filter (t, pred, arg)</strong>
+    </dt>
+    <dd>
+    filter an array's values using a predicate function
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">pred</span>
+            <span class="types"><span class="type">func</span></span>
+         a boolean function
+        </li>
+        <li><span class="parameter">arg</span>
+         optional argument to be passed as second argument of the predicate
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Iterating"></a>Iterating</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "foreach"></a>
+    <strong>foreach (t, fun, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to all elements of a table.
+ The arguments to the function will be the value,
+ the key and <em>finally</em> any extra arguments passed to this function.
+ Note that the Lua 5.0 function table.foreach passed the <em>key</em> first.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function on the elements; <code>function(value, key, ...)</code>
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments passed to <code>fun</code>
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#transform">tablex.transform</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "foreachi"></a>
+    <strong>foreachi (t, fun, ...)</strong>
+    </dt>
+    <dd>
+    apply a function to all elements of a list-like table in order.
+ The arguments to the function will be the value,
+ the index and <em>finally</em> any extra arguments passed to this function
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a table
+        </li>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a function with at least one argument
+        </li>
+        <li><span class="parameter">...</span>
+         optional arguments
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sort"></a>
+    <strong>sort (t, f)</strong>
+    </dt>
+    <dd>
+    return an iterator to a table sorted by its keys
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table
+        </li>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         an optional comparison function (f(x,y) is true if x &lt; y)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator to traverse elements sorted by the keys
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">for</span> k,v <span class="keyword">in</span> tablex.sort(t) <span class="keyword">do</span> <span class="global">print</span>(k,v) <span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "sortv"></a>
+    <strong>sortv (t, f)</strong>
+    </dt>
+    <dd>
+    return an iterator to a table sorted by its values
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         the table
+        </li>
+        <li><span class="parameter">f</span>
+            <span class="types"><span class="type">func</span></span>
+         an optional comparison function (f(x,y) is true if x &lt; y)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an iterator to traverse elements sorted by the values
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">for</span> k,v <span class="keyword">in</span> tablex.sortv(t) <span class="keyword">do</span> <span class="global">print</span>(k,v) <span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Extraction"></a>Extraction</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "keys"></a>
+    <strong>keys (t)</strong>
+    </dt>
+    <dd>
+    return all the keys of a table in arbitrary order.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "values"></a>
+    <strong>values (t)</strong>
+    </dt>
+    <dd>
+    return all the values of the table in arbitrary order
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">tab</span></span>
+         A table
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "sub"></a>
+    <strong>sub (t, first, last)</strong>
+    </dt>
+    <dd>
+    Extract a range from a table, like  'string.sub'.
+ If first or last are negative then they are relative to the end of the list
+ eg. sub(t,-2) gives last 2 entries in a list, and
+ sub(t,-4,-2) gives from -4th to -2nd
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+            <span class="types"><span class="type">array</span></span>
+         a list-like table
+        </li>
+        <li><span class="parameter">first</span>
+            <span class="types"><span class="type">int</span></span>
+         An index
+        </li>
+        <li><span class="parameter">last</span>
+            <span class="types"><span class="type">int</span></span>
+         An index
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a new List
+    </ol>
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Merging"></a>Merging</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "merge"></a>
+    <strong>merge (t1, t2, dup)</strong>
+    </dt>
+    <dd>
+    combine two tables, either as union or intersection.  Corresponds to
+ set operations for sets () but more general. Not particularly
+ useful for list-like tables.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">t2</span>
+            <span class="types"><span class="type">tab</span></span>
+         a table
+        </li>
+        <li><span class="parameter">dup</span>
+            <span class="types"><span class="type">bool</span></span>
+         true for a union, false for an intersection.
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.tablex.html#index_map">tablex.index_map</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <li><pre class="example">merge({alice=<span class="number">23</span>,fred=<span class="number">34</span>},{bob=<span class="number">25</span>,fred=<span class="number">34</span>}) is {fred=<span class="number">34</span>}</pre></li>
+        <li><pre class="example">merge({alice=<span class="number">23</span>,fred=<span class="number">34</span>},{bob=<span class="number">25</span>,fred=<span class="number">34</span>},<span class="keyword">true</span>) is {bob=<span class="number">25</span>,fred=<span class="number">34</span>,alice=<span class="number">23</span>}</pre></li>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "difference"></a>
+    <strong>difference (s1, s2, symm)</strong>
+    </dt>
+    <dd>
+    a new table which is the difference of two tables.
+ With sets (where the values are all true) this is set difference and
+ symmetric difference depending on the third parameter.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+            <span class="types"><span class="type">tab</span></span>
+         a map-like table or set
+        </li>
+        <li><span class="parameter">s2</span>
+            <span class="types"><span class="type">tab</span></span>
+         a map-like table or set
+        </li>
+        <li><span class="parameter">symm</span>
+            <span class="types"><span class="type">bool</span></span>
+         symmetric difference (default false)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a map-like table or set
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "zip"></a>
+    <strong>zip (...)</strong>
+    </dt>
+    <dd>
+    return a table where each element is a table of the ith values of an arbitrary
+ number of tables.  It is equivalent to a matrix transpose.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+            <span class="types"><span class="type">array</span></span>
+         arrays to be zipped
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">zip({<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>},{<span class="number">100</span>,<span class="number">200</span>,<span class="number">300</span>}) is {{<span class="number">10</span>,<span class="number">100</span>},{<span class="number">20</span>,<span class="number">200</span>},{<span class="number">30</span>,<span class="number">300</span>}}</pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.template.html b/Data/Libraries/Penlight/docs/libraries/pl.template.html
new file mode 100644
index 0000000..c2ac2c0
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.template.html
@@ -0,0 +1,336 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><strong>pl.template</strong></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.template</code></h1>
+<p>A template preprocessor.</p>
+<p> Originally by <a href="http://lua-users.org/wiki/SlightlyLessSimpleLuaPreprocessor">Ricki Lake</a></p>
+
+<p> There are two rules:</p>
+
+<ul>
+    <li>lines starting with # are Lua</li>
+    <li>otherwise, <code>$(expr)</code> is the result of evaluating <code>expr</code></li>
+</ul>
+
+<p> Example:</p>
+
+
+<pre>
+#  <span class="keyword">for</span> i = <span class="number">1</span>,<span class="number">3</span> <span class="keyword">do</span>
+   $(i) Hello, Word!
+#  <span class="keyword">end</span>
+===&gt;
+<span class="number">1</span> Hello, Word!
+<span class="number">2</span> Hello, Word!
+<span class="number">3</span> Hello, Word!
+</pre>
+
+<p> Other escape characters can be used, when the defaults conflict
+ with the output language.</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> _,n <span class="keyword">in</span> <span class="global">pairs</span>{<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>} <span class="keyword">do</span>
+static int l_${n} (luaState *state);
+&gt; <span class="keyword">end</span>
+</pre>
+
+<p> See  <a href="../manual/03-strings.md.html#Another_Style_of_Template">the Guide</a>.</p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#substitute">substitute (str[, env])</a></td>
+	<td class="summary">expand the template using the specified environment.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#ct:render">ct:render ([env[, parent[, db]]])</a></td>
+	<td class="summary">executes the previously compiled template and renders it.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compile">compile (str[, opts])</a></td>
+	<td class="summary">compiles the template.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "substitute"></a>
+    <strong>substitute (str[, env])</strong>
+    </dt>
+    <dd>
+
+<p>expand the template using the specified environment.
+ This function will compile and render the template. For more performant
+ recurring usage use the two step approach by using <a href="../libraries/pl.template.html#compile">compile</a> and <a href="../libraries/pl.template.html#ct:render">ct:render</a>.
+ There are six special fields in the environment table <code>env</code></p>
+
+<ul>
+    <li><code>_parent</code>: continue looking up in this table (e.g. <code>_parent=_G</code>).</li>
+    <li><code>_brackets</code>: bracket pair that wraps inline Lua expressions,  default is '()'.</li>
+    <li><code>_escape</code>: character marking Lua lines, default is '#'</li>
+    <li><code>_inline_escape</code>: character marking inline Lua expression, default is '$'.</li>
+    <li><code>_chunk_name</code>: chunk name for loaded templates, used if there
+     is an error in Lua code. Default is 'TMP'.</li>
+    <li><code>_debug</code>: if truthy, the generated code will be printed upon a render error</li>
+</ul>
+
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">str</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the template string
+        </li>
+        <li><span class="parameter">env</span>
+            <span class="types"><span class="type">tab</span></span>
+         the environment
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>rendered template + nil + source_code</code>, or <code>nil + error + source_code</code>. The last
+ return value (<code>source_code</code>) is only returned if the debug option is used.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "ct:render"></a>
+    <strong>ct:render ([env[, parent[, db]]])</strong>
+    </dt>
+    <dd>
+    executes the previously compiled template and renders it.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">env</span>
+            <span class="types"><span class="type">tab</span></span>
+         the environment.
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">parent</span>
+            <span class="types"><span class="type">tab</span></span>
+         continue looking up in this table (e.g. <code>parent=_G</code>).
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">db</span>
+            <span class="types"><span class="type">bool</span></span>
+         if thruthy, it will print the code upon a render error
+ (provided the template was compiled with the debug option).
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>rendered template + nil + source_code</code>, or <code>nil + error + source_code</code>. The last return value
+ (<code>source_code</code>) is only returned if the template was compiled with the debug option.
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> ct, err = template.compile(my_template)
+<span class="keyword">local</span> rendered , err = ct:render(my_env, parent)</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "compile"></a>
+    <strong>compile (str[, opts])</strong>
+    </dt>
+    <dd>
+
+<p>compiles the template.
+ Returns an object that can repeatedly be rendered without parsing/compiling
+ the template again.
+ The options passed in the <code>opts</code> table support the following options:</p>
+
+<ul>
+    <li><code>chunk_name</code>: chunk name for loaded templates, used if there
+     is an error in Lua code. Default is 'TMP'.</li>
+    <li><code>escape</code>: character marking Lua lines, default is '#'</li>
+    <li><code>inline_escape</code>: character marking inline Lua expression, default is '$'.</li>
+    <li><code>inline_brackets</code>: bracket pair that wraps inline Lua expressions, default is '()'.</li>
+    <li><code>newline</code>: string to replace newline characters, default is <code>nil</code> (not replacing newlines).</li>
+    <li><a href="https://www.lua.org/manual/5.1/manual.html#5.9">debug</a>: if truthy, the generated source code will be retained within the compiled template object, default is <code>nil</code>.</li>
+</ul>
+
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">str</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the template string
+        </li>
+        <li><span class="parameter">opts</span>
+            <span class="types"><span class="type">tab</span></span>
+         the compilation options to use
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        template object, or <code>nil + error + source_code</code>
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> ct, err = template.compile(my_template)
+<span class="keyword">local</span> rendered , err = ct:render(my_env, parent)</pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.test.html b/Data/Libraries/Penlight/docs/libraries/pl.test.html
new file mode 100644
index 0000000..72aff1d
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.test.html
@@ -0,0 +1,445 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><strong>pl.test</strong></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.test</code></h1>
+<p>Useful test utilities.</p>
+<p>
+
+
+
+<pre>
+test.asserteq({<span class="number">1</span>,<span class="number">2</span>},{<span class="number">1</span>,<span class="number">2</span>}) <span class="comment">-- can compare tables
+</span>test.asserteq(<span class="number">1.2</span>,<span class="number">1.19</span>,<span class="number">0.02</span>) <span class="comment">-- compare FP numbers within precision
+</span>T = test.tuple <span class="comment">-- used for comparing multiple results
+</span>test.asserteq(T(<span class="global">string</span>.find(<span class="string">" me"</span>,<span class="string">"me"</span>)),T(<span class="number">2</span>,<span class="number">3</span>))
+</pre>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.tablex.html#">pl.tablex</a>, <a href="../libraries/pl.pretty.html#">pl.pretty</a>, <a href="../libraries/pl.path.html#">pl.path</a>, <a href="https://www.lua.org/manual/5.1/manual.html#5.9">debug</a></p>
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#error_handler">error_handler (file, line, got_text, needed_text, msg)</a></td>
+	<td class="summary">error handling for test results.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#complain">complain (x, y, msg, where)</a></td>
+	<td class="summary">general test complain message.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#asserteq">asserteq (x, y, eps, where)</a></td>
+	<td class="summary">like assert, except takes two arguments that must be equal and can be tables.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#assertmatch">assertmatch (s1, s2, where)</a></td>
+	<td class="summary">assert that the first string matches the second.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#assertraise">assertraise (fn, e, where)</a></td>
+	<td class="summary">assert that the function raises a particular error.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#asserteq2">asserteq2 (x1, x2, y1, y2, where)</a></td>
+	<td class="summary">a version of asserteq that takes two pairs of values.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#tuple">tuple (...)</a></td>
+	<td class="summary">encode an arbitrary argument list as a tuple.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#timer">timer (msg, n, fun, ...)</a></td>
+	<td class="summary">Time a function.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "error_handler"></a>
+    <strong>error_handler (file, line, got_text, needed_text, msg)</strong>
+    </dt>
+    <dd>
+    error handling for test results.
+ By default, this writes to stderr and exits the program.
+ Re-define this function to raise an error and/or redirect output
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">file</span>
+
+
+
+        </li>
+        <li><span class="parameter">line</span>
+
+
+
+        </li>
+        <li><span class="parameter">got_text</span>
+
+
+
+        </li>
+        <li><span class="parameter">needed_text</span>
+
+
+
+        </li>
+        <li><span class="parameter">msg</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "complain"></a>
+    <strong>complain (x, y, msg, where)</strong>
+    </dt>
+    <dd>
+    general test complain message.
+ Useful for composing new test functions (see tests/tablex.lua for an example)
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         a value
+        </li>
+        <li><span class="parameter">y</span>
+         value to compare first value against
+        </li>
+        <li><span class="parameter">msg</span>
+         message
+        </li>
+        <li><span class="parameter">where</span>
+         extra level offset for errors
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "asserteq"></a>
+    <strong>asserteq (x, y, eps, where)</strong>
+    </dt>
+    <dd>
+    like assert, except takes two arguments that must be equal and can be tables.
+ If they are plain tables, it will use tablex.deepcompare.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         any value
+        </li>
+        <li><span class="parameter">y</span>
+         a value equal to x
+        </li>
+        <li><span class="parameter">eps</span>
+         an optional tolerance for numerical comparisons
+        </li>
+        <li><span class="parameter">where</span>
+         extra level offset
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "assertmatch"></a>
+    <strong>assertmatch (s1, s2, where)</strong>
+    </dt>
+    <dd>
+    assert that the first string matches the second.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s1</span>
+         a string
+        </li>
+        <li><span class="parameter">s2</span>
+         a string
+        </li>
+        <li><span class="parameter">where</span>
+         extra level offset
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "assertraise"></a>
+    <strong>assertraise (fn, e, where)</strong>
+    </dt>
+    <dd>
+    assert that the function raises a particular error.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+         a function or a table of the form {function,arg1,...}
+        </li>
+        <li><span class="parameter">e</span>
+         a string to match the error against
+        </li>
+        <li><span class="parameter">where</span>
+         extra level offset
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "asserteq2"></a>
+    <strong>asserteq2 (x1, x2, y1, y2, where)</strong>
+    </dt>
+    <dd>
+    a version of asserteq that takes two pairs of values.
+ <code>x1==y1 and x2==y2</code> must be true. Useful for functions that naturally
+ return two values.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x1</span>
+         any value
+        </li>
+        <li><span class="parameter">x2</span>
+         any value
+        </li>
+        <li><span class="parameter">y1</span>
+         any value
+        </li>
+        <li><span class="parameter">y2</span>
+         any value
+        </li>
+        <li><span class="parameter">where</span>
+         extra level offset
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "tuple"></a>
+    <strong>tuple (...)</strong>
+    </dt>
+    <dd>
+    encode an arbitrary argument list as a tuple.
+ This can be used to compare to other argument lists, which is
+ very useful for testing functions which return a number of values.
+ Unlike regular array-like tables ('sequences') they may contain nils.
+ Tuples understand equality and know how to print themselves out.
+ The # operator is defined to be the size, irrespecive of any nils,
+ and there is an <a href="https://www.lua.org/manual/5.1/manual.html#pdf-unpack">unpack</a> method.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+
+
+
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">asserteq(tuple( (<span class="string">'ab'</span>):find <span class="string">'a'</span>), tuple(<span class="number">1</span>,<span class="number">1</span>))</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "timer"></a>
+    <strong>timer (msg, n, fun, ...)</strong>
+    </dt>
+    <dd>
+    Time a function.  Call the function a given number of times, and report the number of seconds taken,
+ together with a message.  Any extra arguments will be passed to the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">msg</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         a descriptive message
+        </li>
+        <li><span class="parameter">n</span>
+            <span class="types"><span class="type">int</span></span>
+         number of times to call the function
+        </li>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         the function
+        </li>
+        <li><span class="parameter">...</span>
+         optional arguments to fun
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.text.html b/Data/Libraries/Penlight/docs/libraries/pl.text.html
new file mode 100644
index 0000000..77b7db1
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.text.html
@@ -0,0 +1,381 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><strong>pl.text</strong></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.text</code></h1>
+<p>Text processing utilities.</p>
+<p> This provides a Template class (modeled after the same from the Python
+ libraries, see string.Template). It also provides similar functions to those
+ found in the textwrap module.</p>
+
+<p> See  <a href="../manual/03-strings.md.html#String_Templates">the Guide</a>.</p>
+
+<p> Calling <code>text.format_operator()</code> overloads the % operator for strings to give Python/Ruby style formated output.
+ This is extended to also do template-like substitution for map-like data.</p>
+
+
+<pre>
+&gt; <span class="global">require</span> <span class="string">'pl.text'</span>.format_operator()
+&gt; = <span class="string">'%s = %5.3f'</span> % {<span class="string">'PI'</span>,<span class="global">math</span>.pi}
+PI = <span class="number">3.142</span>
+&gt; = <span class="string">'$name = $value'</span> % {name=<span class="string">'dog'</span>,value=<span class="string">'Pluto'</span>}
+dog = Pluto
+</pre>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a>, <a href="../libraries/pl.types.html#">pl.types</a></p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#indent">indent (s, n, ch)</a></td>
+	<td class="summary">indent a multiline string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#dedent">dedent (s)</a></td>
+	<td class="summary">dedent a multiline string by removing any initial indent.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#wrap">wrap (s, width)</a></td>
+	<td class="summary">format a paragraph into lines so that they fit into a line width.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#fill">fill (s, width)</a></td>
+	<td class="summary">format a paragraph so that it fits into a line width.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Template:substitute">Template:substitute (tbl)</a></td>
+	<td class="summary">substitute values into a template, throwing an error.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Template:safe_substitute">Template:safe_substitute (tbl)</a></td>
+	<td class="summary">substitute values into a template.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Template:indent_substitute">Template:indent_substitute (tbl)</a></td>
+	<td class="summary">substitute values into a template, preserving indentation.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "indent"></a>
+    <strong>indent (s, n, ch)</strong>
+    </dt>
+    <dd>
+    indent a multiline string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the string
+        </li>
+        <li><span class="parameter">n</span>
+         the size of the indent
+        </li>
+        <li><span class="parameter">ch</span>
+         the character to use when indenting (default ' ')
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        indented string
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "dedent"></a>
+    <strong>dedent (s)</strong>
+    </dt>
+    <dd>
+    dedent a multiline string by removing any initial indent.
+ useful when working with [[..]] strings.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string with initial indent zero.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "wrap"></a>
+    <strong>wrap (s, width)</strong>
+    </dt>
+    <dd>
+    format a paragraph into lines so that they fit into a line width.
+ It will not break long words, so lines can be over the length
+ to that extent.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the string
+        </li>
+        <li><span class="parameter">width</span>
+         the margin width, default 70
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list of lines (List object)
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../classes/pl.List.html#">pl.List</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "fill"></a>
+    <strong>fill (s, width)</strong>
+    </dt>
+    <dd>
+    format a paragraph so that it fits into a line width.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the string
+        </li>
+        <li><span class="parameter">width</span>
+         the margin width, default 70
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.text.html#wrap">wrap</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "Template:substitute"></a>
+    <strong>Template:substitute (tbl)</strong>
+    </dt>
+    <dd>
+    substitute values into a template, throwing an error.
+ This will throw an error if no name is found.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tbl</span>
+         a table of name-value pairs.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Template:safe_substitute"></a>
+    <strong>Template:safe_substitute (tbl)</strong>
+    </dt>
+    <dd>
+    substitute values into a template.
+ This version just passes unknown names through.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tbl</span>
+         a table of name-value pairs.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Template:indent_substitute"></a>
+    <strong>Template:indent_substitute (tbl)</strong>
+    </dt>
+    <dd>
+    substitute values into a template, preserving indentation.  <br>
+ If the value is a multiline string <em>or</em> a template, it will insert
+ the lines at the correct indentation. <br>
+ Furthermore, if a template, then that template will be subsituted
+ using the same table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tbl</span>
+         a table of name-value pairs.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.types.html b/Data/Libraries/Penlight/docs/libraries/pl.types.html
new file mode 100644
index 0000000..252005e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.types.html
@@ -0,0 +1,475 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><strong>pl.types</strong></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.types</code></h1>
+<p>Dealing with Detailed Type Information</p>
+<p>
+
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#is_callable">is_callable (obj)</a></td>
+	<td class="summary">is the object either a function or a callable object?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_type">is_type (obj, tp)</a></td>
+	<td class="summary">is the object of the specified type?.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#type">type (obj)</a></td>
+	<td class="summary">a string representation of a type.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_integer">is_integer (x)</a></td>
+	<td class="summary">is this number an integer?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_empty">is_empty (o, ignore_spaces)</a></td>
+	<td class="summary">Check if the object is "empty".</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_indexable">is_indexable (val)</a></td>
+	<td class="summary">is an object 'array-like'?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_iterable">is_iterable (val)</a></td>
+	<td class="summary">can an object be iterated over with <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pairs">pairs</a>?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_writeable">is_writeable (val)</a></td>
+	<td class="summary">can an object accept new key/pair values?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#to_bool">to_bool (o[, true_strs[, check_objs]])</a></td>
+	<td class="summary">Convert to a boolean value.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "is_callable"></a>
+    <strong>is_callable (obj)</strong>
+    </dt>
+    <dd>
+    is the object either a function or a callable object?.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">obj</span>
+         Object to check.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_type"></a>
+    <strong>is_type (obj, tp)</strong>
+    </dt>
+    <dd>
+    is the object of the specified type?.
+ If the type is a string, then use type, otherwise compare with metatable.</p>
+
+<p> NOTE: this function is imported from <a href="../libraries/pl.utils.html#is_type">utils.is_type</a>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">obj</span>
+         An object to check
+        </li>
+        <li><span class="parameter">tp</span>
+         The expected type
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#is_type">utils.is_type</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "type"></a>
+    <strong>type (obj)</strong>
+    </dt>
+    <dd>
+    a string representation of a type.
+ For tables and userdata with metatables, we assume that the metatable has a <code>_name</code>
+ field. If the field is not present it will return 'unknown table' or
+ 'unknown userdata'.
+ Lua file objects return the type 'file'.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">obj</span>
+         an object
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string like 'number', 'table', 'file' or 'List'
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_integer"></a>
+    <strong>is_integer (x)</strong>
+    </dt>
+    <dd>
+    is this number an integer?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">x</span>
+         a number
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        boolean
+    </ol>
+
+    <h3>Raises:</h3>
+    error if x is not a number
+
+
+
+</dd>
+    <dt>
+    <a name = "is_empty"></a>
+    <strong>is_empty (o, ignore_spaces)</strong>
+    </dt>
+    <dd>
+
+<p>Check if the object is "empty".
+ An object is considered empty if it is:</p>
+
+<ul>
+    <li><code>nil</code></li>
+    <li>a table without any items (key-value pairs or indexes)</li>
+    <li>a string with no content ("")</li>
+    <li>not a nil/table/string</li>
+</ul>
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">o</span>
+         The object to check if it is empty.
+        </li>
+        <li><span class="parameter">ignore_spaces</span>
+         If the object is a string and this is true the string is
+ considered empty if it only contains spaces.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if the object is empty, otherwise a falsy value.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_indexable"></a>
+    <strong>is_indexable (val)</strong>
+    </dt>
+    <dd>
+    is an object 'array-like'?
+ An object is array like if:</p>
+
+<ul>
+    <li>it is a table, or</li>
+    <li>it has a metatable with <code>__len</code> and <code>__index</code> methods</li>
+</ul>
+
+<p> NOTE: since <code>__len</code> is 5.2+, on 5.1 is usually returns <code>false</code> for userdata
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">val</span>
+         any value.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if the object is array-like, otherwise a falsy value.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_iterable"></a>
+    <strong>is_iterable (val)</strong>
+    </dt>
+    <dd>
+    can an object be iterated over with <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pairs">pairs</a>?
+ An object is iterable if:</p>
+
+<ul>
+    <li>it is a table, or</li>
+    <li>it has a metatable with a <code>__pairs</code> meta method</li>
+</ul>
+
+<p> NOTE: since <code>__pairs</code> is 5.2+, on 5.1 is usually returns <code>false</code> for userdata
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">val</span>
+         any value.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if the object is iterable, otherwise a falsy value.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_writeable"></a>
+    <strong>is_writeable (val)</strong>
+    </dt>
+    <dd>
+
+<p>can an object accept new key/pair values?
+ An object is iterable if:</p>
+
+<ul>
+    <li>it is a table, or</li>
+    <li>it has a metatable with a <code>__newindex</code> meta method</li>
+</ul>
+
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">val</span>
+         any value.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        <code>true</code> if the object is writeable, otherwise a falsy value.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "to_bool"></a>
+    <strong>to_bool (o[, true_strs[, check_objs]])</strong>
+    </dt>
+    <dd>
+
+<p>Convert to a boolean value.
+ True values are:</p>
+
+<ul>
+    <li>boolean: true.</li>
+    <li>string: 'yes', 'y', 'true', 't', '1' or additional strings specified by <code>true_strs</code>.</li>
+    <li>number: Any non-zero value.</li>
+    <li>table: Is not empty and <code>check_objs</code> is true.</li>
+    <li>everything else: Is not <code>nil</code> and <code>check_objs</code> is true.</li>
+</ul>
+
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">o</span>
+         The object to evaluate.
+        </li>
+        <li><span class="parameter">true_strs</span>
+         optional Additional strings that when matched should evaluate to true. Comparison is case insensitive.
+ This should be a List of strings. E.g. "ja" to support German.
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">check_objs</span>
+         True if objects should be evaluated.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        true if the input evaluates to true, otherwise false.
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.url.html b/Data/Libraries/Penlight/docs/libraries/pl.url.html
new file mode 100644
index 0000000..7c97371
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.url.html
@@ -0,0 +1,212 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><strong>pl.url</strong></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.url</code></h1>
+<p>Python-style URL quoting library.</p>
+<p>
+
+</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#quote">quote (s, quote_plus)</a></td>
+	<td class="summary">Quote the url, replacing special characters using the '%xx' escape.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#unquote">unquote (s)</a></td>
+	<td class="summary">Unquote the url, replacing '%xx' escapes and plus signs.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "quote"></a>
+    <strong>quote (s, quote_plus)</strong>
+    </dt>
+    <dd>
+    Quote the url, replacing special characters using the '%xx' escape.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+        <li><span class="parameter">quote_plus</span>
+            <span class="types"><span class="type">bool</span></span>
+         Also escape slashes and replace spaces by plus signs.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        The quoted string, or if <code>s</code> wasn't a string, just plain unaltered <code>s</code>.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "unquote"></a>
+    <strong>unquote (s)</strong>
+    </dt>
+    <dd>
+    Unquote the url, replacing '%xx' escapes and plus signs.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+            <span class="types"><a class="type" href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
+         the string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        The unquoted string, or if <code>s</code> wasn't a string, just plain unaltered <code>s</code>.
+    </ol>
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.utils.html b/Data/Libraries/Penlight/docs/libraries/pl.utils.html
new file mode 100644
index 0000000..ee1773a
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.utils.html
@@ -0,0 +1,1384 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+<li><a href="#Tables">Tables</a></li>
+<li><a href="#Error_handling">Error handling </a></li>
+<li><a href="#File_handling">File handling </a></li>
+<li><a href="#OS_functions">OS functions </a></li>
+<li><a href="#String_functions">String functions </a></li>
+<li><a href="#Functional">Functional </a></li>
+<li><a href="#Deprecation">Deprecation </a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><strong>pl.utils</strong></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.utils</code></h1>
+<p>Generally useful routines.</p>
+<p> See  <a href="../manual/01-introduction.md.html#Generally_useful_functions_">the Guide</a>.</p>
+
+<p> Dependencies: <a href="../libraries/pl.compat.html#">pl.compat</a>, all exported fields and functions from
+ <a href="../libraries/pl.compat.html#">pl.compat</a> are also available in this module.</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#pack">pack (...)</a></td>
+	<td class="summary">pack an argument list into a table.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#unpack">unpack (t[, i[, t]])</a></td>
+	<td class="summary">unpack a table and return its contents.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#printf">printf (fmt, ...)</a></td>
+	<td class="summary">print an arbitrary number of arguments using a format.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#fprintf">fprintf (f, fmt, ...)</a></td>
+	<td class="summary">write an arbitrary number of arguments to a file using a format.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#import">import (t, T)</a></td>
+	<td class="summary">take a table and 'inject' it into the local namespace.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#choose">choose (cond, value1, value2)</a></td>
+	<td class="summary">return either of two values, depending on a condition.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#array_tostring">array_tostring (t[, temp[, tostr]])</a></td>
+	<td class="summary">convert an array of values to strings.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_type">is_type (obj, tp)</a></td>
+	<td class="summary">is the object of the specified type?</td>
+	</tr>
+</table>
+<h2><a href="#Tables">Tables</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#patterns">patterns</a></td>
+	<td class="summary">Some standard patterns</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#stdmt">stdmt</a></td>
+	<td class="summary">Standard meta-tables as used by other Penlight modules</td>
+	</tr>
+</table>
+<h2><a href="#Error_handling">Error handling </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#assert_arg">assert_arg (n, val, tp, verify, msg, lev)</a></td>
+	<td class="summary">assert that the given argument is in fact of the correct type.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#function_arg">function_arg (idx, f, msg)</a></td>
+	<td class="summary">process a function argument.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#assert_string">assert_string (n, val)</a></td>
+	<td class="summary">assert the common case that the argument is a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#on_error">on_error (mode)</a></td>
+	<td class="summary">control the error strategy used by Penlight.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#raise">raise (err)</a></td>
+	<td class="summary">used by Penlight functions to return errors.</td>
+	</tr>
+</table>
+<h2><a href="#File_handling">File handling </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#readfile">readfile (filename, is_bin)</a></td>
+	<td class="summary">return the contents of a file as a string</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#writefile">writefile (filename, str, is_bin)</a></td>
+	<td class="summary">write a string to a file</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#readlines">readlines (filename)</a></td>
+	<td class="summary">return the contents of a file as a list of lines</td>
+	</tr>
+</table>
+<h2><a href="#OS_functions">OS functions </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#executeex">executeex (cmd, bin)</a></td>
+	<td class="summary">execute a shell command and return the output.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#quote_arg">quote_arg (argument)</a></td>
+	<td class="summary">Quote and escape an argument of a command.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#quit">quit ([code], msg, ...)</a></td>
+	<td class="summary">error out of this program gracefully.</td>
+	</tr>
+</table>
+<h2><a href="#String_functions">String functions </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#escape">escape (s)</a></td>
+	<td class="summary">escape any Lua 'magic' characters in a string</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#split">split (s, re, plain, n)</a></td>
+	<td class="summary">split a string into a list of strings separated by a delimiter.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#splitv">splitv (s, re, plain, n)</a></td>
+	<td class="summary">split a string into a number of return values.</td>
+	</tr>
+</table>
+<h2><a href="#Functional">Functional </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#memoize">memoize (func)</a></td>
+	<td class="summary">'memoize' a function (cache returned value for next call).</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#add_function_factory">add_function_factory (mt, fun)</a></td>
+	<td class="summary">associate a function factory with a type.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#string_lambda">string_lambda (lf)</a></td>
+	<td class="summary">an anonymous function as a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#bind1">bind1 (fn, p)</a></td>
+	<td class="summary">bind the first argument of the function to a value.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#bind2">bind2 (fn, p)</a></td>
+	<td class="summary">bind the second argument of the function to a value.</td>
+	</tr>
+</table>
+<h2><a href="#Deprecation">Deprecation </a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#set_deprecation_func">set_deprecation_func (func)</a></td>
+	<td class="summary">Sets a deprecation warning function.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#raise_deprecation">raise_deprecation (opts)</a></td>
+	<td class="summary">raises a deprecation warning.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "pack"></a>
+    <strong>pack (...)</strong>
+    </dt>
+    <dd>
+    pack an argument list into a table.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">...</span>
+         any arguments
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a table with field <code>n</code> set to the length
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.compat.html#table.pack">compat.pack</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "unpack"></a>
+    <strong>unpack (t[, i[, t]])</strong>
+    </dt>
+    <dd>
+    unpack a table and return its contents. </p>
+
+<p> NOTE: this implementation differs from the Lua implementation in the way
+ that this one DOES honor the <code>n</code> field in the table <code>t</code>, such that it is 'nil-safe'.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         index of the last element to unpack, defaults to <code>t.n</code> or <code>#t</code>
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">i</span>
+         index from which to start unpacking, defaults to 1
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">t</span>
+         index of the last element to unpack, defaults to <code>t.n</code> or <code>#t</code>
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        multiple return values from the table
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.compat.html#table.unpack">compat.unpack</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> t = <span class="global">table</span>.pack(<span class="keyword">nil</span>, <span class="keyword">nil</span>, <span class="keyword">nil</span>, <span class="number">4</span>)
+<span class="keyword">local</span> a, b, c, d = <span class="global">table</span>.<span class="global">unpack</span>(t)   <span class="comment">-- this <a href="../libraries/pl.utils.html#unpack">unpack</a> is NOT nil-safe, so d == nil
+</span>
+<span class="keyword">local</span> a, b, c, d = utils.<span class="global">unpack</span>(t)   <span class="comment">-- this is nil-safe, so d == 4</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "printf"></a>
+    <strong>printf (fmt, ...)</strong>
+    </dt>
+    <dd>
+    print an arbitrary number of arguments using a format.
+ Output will be sent to <code>stdout</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fmt</span>
+         The format (see <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.format">string.format</a>)
+        </li>
+        <li><span class="parameter">...</span>
+         Extra arguments for format
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "fprintf"></a>
+    <strong>fprintf (f, fmt, ...)</strong>
+    </dt>
+    <dd>
+    write an arbitrary number of arguments to a file using a format.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">f</span>
+         File handle to write to.
+        </li>
+        <li><span class="parameter">fmt</span>
+         The format (see <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.format">string.format</a>).
+        </li>
+        <li><span class="parameter">...</span>
+         Extra arguments for format
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "import"></a>
+    <strong>import (t, T)</strong>
+    </dt>
+    <dd>
+    take a table and 'inject' it into the local namespace.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         The table (table), or module name (string), defaults to this <a href="../libraries/pl.utils.html">utils</a> module table
+        </li>
+        <li><span class="parameter">T</span>
+         An optional destination table (defaults to callers environment)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "choose"></a>
+    <strong>choose (cond, value1, value2)</strong>
+    </dt>
+    <dd>
+    return either of two values, depending on a condition.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cond</span>
+         A condition
+        </li>
+        <li><span class="parameter">value1</span>
+         Value returned if cond is truthy
+        </li>
+        <li><span class="parameter">value2</span>
+         Value returned if cond is falsy
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "array_tostring"></a>
+    <strong>array_tostring (t[, temp[, tostr]])</strong>
+    </dt>
+    <dd>
+    convert an array of values to strings.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         a list-like table
+        </li>
+        <li><span class="parameter">temp</span>
+         (table) buffer to use, otherwise allocate
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">tostr</span>
+         custom tostring function, called with (value,index). Defaults to <a href="https://www.lua.org/manual/5.1/manual.html#pdf-tostring">tostring</a>.
+         (<em>optional</em>)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the converted buffer
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_type"></a>
+    <strong>is_type (obj, tp)</strong>
+    </dt>
+    <dd>
+    is the object of the specified type?
+ If the type is a string, then use type, otherwise compare with metatable
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">obj</span>
+         An object to check
+        </li>
+        <li><span class="parameter">tp</span>
+         String of what type it should be
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        boolean
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">utils.is_type(<span class="string">"hello world"</span>, <span class="string">"string"</span>)   <span class="comment">--&gt; true
+</span><span class="comment">-- or check metatable
+</span><span class="keyword">local</span> my_mt = {}
+<span class="keyword">local</span> my_obj = <span class="global">setmetatable</span>(my_obj, my_mt)
+utils.is_type(my_obj, my_mt)  <span class="comment">--&gt; true</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Tables"></a>Tables</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "patterns"></a>
+    <strong>patterns</strong>
+    </dt>
+    <dd>
+    Some standard patterns
+
+
+    <h3>Fields:</h3>
+    <ul>
+        <li><span class="parameter">FLOAT</span>
+        floating point number
+        </li>
+        <li><span class="parameter">INTEGER</span>
+        integer number
+        </li>
+        <li><span class="parameter">IDEN</span>
+        identifier
+        </li>
+        <li><span class="parameter">FILE</span>
+        file
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "stdmt"></a>
+    <strong>stdmt</strong>
+    </dt>
+    <dd>
+    Standard meta-tables as used by other Penlight modules
+
+
+    <h3>Fields:</h3>
+    <ul>
+        <li><span class="parameter">List</span>
+         the List metatable
+        </li>
+        <li><span class="parameter">Map</span>
+         the Map metatable
+        </li>
+        <li><span class="parameter">Set</span>
+         the Set metatable
+        </li>
+        <li><span class="parameter">MultiMap</span>
+         the MultiMap metatable
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Error_handling"></a>Error handling </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "assert_arg"></a>
+    <strong>assert_arg (n, val, tp, verify, msg, lev)</strong>
+    </dt>
+    <dd>
+    assert that the given argument is in fact of the correct type.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">n</span>
+         argument index
+        </li>
+        <li><span class="parameter">val</span>
+         the value
+        </li>
+        <li><span class="parameter">tp</span>
+         the type
+        </li>
+        <li><span class="parameter">verify</span>
+         an optional verification function
+        </li>
+        <li><span class="parameter">msg</span>
+         an optional custom message
+        </li>
+        <li><span class="parameter">lev</span>
+         optional stack position for trace, default 2
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the validated value
+    </ol>
+
+    <h3>Raises:</h3>
+    if <code>val</code> is not the correct type
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> param1 = assert_arg(<span class="number">1</span>,<span class="string">"hello"</span>,<span class="string">'table'</span>)  <span class="comment">--&gt; error: argument 1 expected a 'table', got a 'string'
+</span><span class="keyword">local</span> param4 = assert_arg(<span class="number">4</span>,<span class="string">'!@#$%^&amp;*'</span>,<span class="string">'string'</span>,path.isdir,<span class="string">'not a directory'</span>)
+     <span class="comment">--&gt; error: argument 4: '!@#$%^&amp;*' not a directory</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "function_arg"></a>
+    <strong>function_arg (idx, f, msg)</strong>
+    </dt>
+    <dd>
+    process a function argument.
+ This is used throughout Penlight and defines what is meant by a function:
+ Something that is callable, or an operator string as defined by <code>pl.operator</code>,
+ such as '>' or '#'. If a function factory has been registered for the type, it will
+ be called to get the function.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">idx</span>
+         argument index
+        </li>
+        <li><span class="parameter">f</span>
+         a function, operator string, or callable object
+        </li>
+        <li><span class="parameter">msg</span>
+         optional error message
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a callable
+    </ol>
+
+    <h3>Raises:</h3>
+    if idx is not a number or if f is not callable
+
+
+
+</dd>
+    <dt>
+    <a name = "assert_string"></a>
+    <strong>assert_string (n, val)</strong>
+    </dt>
+    <dd>
+    assert the common case that the argument is a string.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">n</span>
+         argument index
+        </li>
+        <li><span class="parameter">val</span>
+         a value that must be a string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        the validated value
+    </ol>
+
+    <h3>Raises:</h3>
+    val must be a string
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> val = <span class="number">42</span>
+<span class="keyword">local</span> param2 = utils.assert_string(<span class="number">2</span>, val) <span class="comment">--&gt; error: argument 2 expected a 'string', got a 'number'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "on_error"></a>
+    <strong>on_error (mode)</strong>
+    </dt>
+    <dd>
+
+<p>control the error strategy used by Penlight.
+ This is a global setting that controls how <a href="../libraries/pl.utils.html#raise">utils.raise</a> behaves:</p>
+
+<ul>
+    <li>'default': return <code>nil + error</code> (this is the default)</li>
+    <li>'error': throw a Lua error</li>
+    <li>'quit': exit the program</li>
+</ul>
+
+
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">mode</span>
+         either 'default', 'quit'  or 'error'
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#raise">utils.raise</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "raise"></a>
+    <strong>raise (err)</strong>
+    </dt>
+    <dd>
+    used by Penlight functions to return errors.  Its global behaviour is controlled
+ by <a href="../libraries/pl.utils.html#on_error">utils.on_error</a>.
+ To use this function you MUST use it in conjunction with <code>return</code>, since it might
+ return <code>nil + error</code>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">err</span>
+         the error string.
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#on_error">utils.on_error</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">if</span> some_condition <span class="keyword">then</span>
+  <span class="keyword">return</span> utils.raise(<span class="string">"some condition was not met"</span>)  <span class="comment">-- MUST use 'return'!
+</span><span class="keyword">end</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="File_handling"></a>File handling </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "readfile"></a>
+    <strong>readfile (filename, is_bin)</strong>
+    </dt>
+    <dd>
+    return the contents of a file as a string
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">filename</span>
+         The file path
+        </li>
+        <li><span class="parameter">is_bin</span>
+         open in binary mode
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        file contents
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "writefile"></a>
+    <strong>writefile (filename, str, is_bin)</strong>
+    </dt>
+    <dd>
+    write a string to a file
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">filename</span>
+         The file path
+        </li>
+        <li><span class="parameter">str</span>
+         The string
+        </li>
+        <li><span class="parameter">is_bin</span>
+         open in binary mode
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        true or nil</li>
+        <li>
+        error message</li>
+    </ol>
+
+    <h3>Raises:</h3>
+    error if filename or str aren't strings
+
+
+
+</dd>
+    <dt>
+    <a name = "readlines"></a>
+    <strong>readlines (filename)</strong>
+    </dt>
+    <dd>
+    return the contents of a file as a list of lines
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">filename</span>
+         The file path
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        file contents as a table
+    </ol>
+
+    <h3>Raises:</h3>
+    error if filename is not a string
+
+
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="OS_functions"></a>OS functions </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "executeex"></a>
+    <strong>executeex (cmd, bin)</strong>
+    </dt>
+    <dd>
+    execute a shell command and return the output.
+ This function redirects the output to tempfiles and returns the content of those files.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">cmd</span>
+         a shell command
+        </li>
+        <li><span class="parameter">bin</span>
+         boolean, if true, read output as binary file
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        true if successful</li>
+        <li>
+        actual return code</li>
+        <li>
+        stdout output (string)</li>
+        <li>
+        errout output (string)</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "quote_arg"></a>
+    <strong>quote_arg (argument)</strong>
+    </dt>
+    <dd>
+    Quote and escape an argument of a command.
+ Quotes a single (or list of) argument(s) of a command to be passed
+ to <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.execute">os.execute</a>, <code>pl.utils.execute</code> or <a href="../libraries/pl.utils.html#executeex">pl.utils.executeex</a>.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">argument</span>
+         (string or table/list) the argument to quote. If a list then
+ all arguments in the list will be returned as a single string quoted.
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        quoted and escaped argument.
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> options = utils.quote_arg {
+    <span class="string">"-lluacov"</span>,
+    <span class="string">"-e"</span>,
+    <span class="string">"utils = print(require('pl.utils')._VERSION"</span>,
+}
+<span class="comment">-- returns: -lluacov -e 'utils = print(require('\''pl.utils'\'')._VERSION'</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "quit"></a>
+    <strong>quit ([code], msg, ...)</strong>
+    </dt>
+    <dd>
+    error out of this program gracefully.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">code</span>
+         The exit code, defaults to -<code>1</code> if omitted
+         (<em>optional</em>)
+        </li>
+        <li><span class="parameter">msg</span>
+         The exit message will be sent to <code>stderr</code> (will be formatted with the extra parameters)
+        </li>
+        <li><span class="parameter">...</span>
+         extra arguments for message's format'
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#fprintf">utils.fprintf</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">utils.quit(-<span class="number">1</span>, <span class="string">"Error '%s' happened"</span>, <span class="string">"42"</span>)
+<span class="comment">-- is equivalent to
+</span>utils.quit(<span class="string">"Error '%s' happened"</span>, <span class="string">"42"</span>)  <span class="comment">--&gt; Error '42' happened</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="String_functions"></a>String functions </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "escape"></a>
+    <strong>escape (s)</strong>
+    </dt>
+    <dd>
+    escape any Lua 'magic' characters in a string
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         The input string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "split"></a>
+    <strong>split (s, re, plain, n)</strong>
+    </dt>
+    <dd>
+    split a string into a list of strings separated by a delimiter.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         The input string
+        </li>
+        <li><span class="parameter">re</span>
+         optional A Lua string pattern; defaults to '%s+'
+        </li>
+        <li><span class="parameter">plain</span>
+         optional If truthy don't use Lua patterns
+        </li>
+        <li><span class="parameter">n</span>
+         optional maximum number of elements (if there are more, the last will remian un-split)
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list-like table
+    </ol>
+
+    <h3>Raises:</h3>
+    error if s is not a string
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#splitv">splitv</a>
+    </ul>
+
+
+</dd>
+    <dt>
+    <a name = "splitv"></a>
+    <strong>splitv (s, re, plain, n)</strong>
+    </dt>
+    <dd>
+    split a string into a number of return values.
+ Identical to <a href="../libraries/pl.utils.html#split">split</a> but returns multiple sub-strings instead of
+ a single list of sub-strings.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the string
+        </li>
+        <li><span class="parameter">re</span>
+         A Lua string pattern; defaults to '%s+'
+        </li>
+        <li><span class="parameter">plain</span>
+         don't use Lua patterns
+        </li>
+        <li><span class="parameter">n</span>
+         optional maximum number of splits
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        n values
+    </ol>
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#split">split</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">first,<span class="global">next</span> = splitv(<span class="string">'user=jane=doe'</span>,<span class="string">'='</span>, <span class="keyword">false</span>, <span class="number">2</span>)
+<span class="global">assert</span>(first == <span class="string">"user"</span>)
+<span class="global">assert</span>(<span class="global">next</span> == <span class="string">"jane=doe"</span>)</pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Functional"></a>Functional </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "memoize"></a>
+    <strong>memoize (func)</strong>
+    </dt>
+    <dd>
+    'memoize' a function (cache returned value for next call).
+ This is useful if you have a function which is relatively expensive,
+ but you don't know in advance what values will be required, so
+ building a table upfront is wasteful/impossible.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">func</span>
+         a function of at least one argument
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function with at least one argument, which is used as the key.
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "add_function_factory"></a>
+    <strong>add_function_factory (mt, fun)</strong>
+    </dt>
+    <dd>
+    associate a function factory with a type.
+ A function factory takes an object of the given type and
+ returns a function for evaluating it
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">mt</span>
+            <span class="types"><span class="type">tab</span></span>
+         metatable
+        </li>
+        <li><span class="parameter">fun</span>
+            <span class="types"><span class="type">func</span></span>
+         a callable that returns a function
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "string_lambda"></a>
+    <strong>string_lambda (lf)</strong>
+    </dt>
+    <dd>
+    an anonymous function as a string.  This string is either of the form
+ '|args| expression' or is a function of one argument, '_'
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">lf</span>
+         function as a string
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function
+    </ol>
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">string_lambda <span class="string">'|x|x+1'</span> (<span class="number">2</span>) == <span class="number">3</span>
+string_lambda <span class="string">'_+1'</span> (<span class="number">2</span>) == <span class="number">3</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "bind1"></a>
+    <strong>bind1 (fn, p)</strong>
+    </dt>
+    <dd>
+    bind the first argument of the function to a value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+         a function of at least two values (may be an operator string)
+        </li>
+        <li><span class="parameter">p</span>
+         a value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function such that f(x) is fn(p,x)
+    </ol>
+
+    <h3>Raises:</h3>
+    same as <a href="../libraries/pl.utils.html#function_arg">function_arg</a>
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.func.html#bind1">func.bind1</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> <span class="keyword">function</span> f(msg, name)
+  <span class="global">print</span>(msg .. <span class="string">" "</span> .. name)
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> hello = utils.bind1(f, <span class="string">"Hello"</span>)
+
+<span class="global">print</span>(hello(<span class="string">"world"</span>))     <span class="comment">--&gt; "Hello world"
+</span><span class="global">print</span>(hello(<span class="string">"sunshine"</span>))  <span class="comment">--&gt; "Hello sunshine"</span></pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "bind2"></a>
+    <strong>bind2 (fn, p)</strong>
+    </dt>
+    <dd>
+    bind the second argument of the function to a value.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">fn</span>
+         a function of at least two values (may be an operator string)
+        </li>
+        <li><span class="parameter">p</span>
+         a value
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a function such that f(x) is fn(x,p)
+    </ol>
+
+    <h3>Raises:</h3>
+    same as <a href="../libraries/pl.utils.html#function_arg">function_arg</a>
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> <span class="keyword">function</span> f(a, b, c)
+  <span class="global">print</span>(a .. <span class="string">" "</span> .. b .. <span class="string">" "</span> .. c)
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> hello = utils.bind1(f, <span class="string">"world"</span>)
+
+<span class="global">print</span>(hello(<span class="string">"Hello"</span>, <span class="string">"!"</span>))  <span class="comment">--&gt; "Hello world !"
+</span><span class="global">print</span>(hello(<span class="string">"Bye"</span>, <span class="string">"?"</span>))    <span class="comment">--&gt; "Bye world ?"</span></pre>
+    </ul>
+
+</dd>
+</dl>
+    <h2 class="section-header "><a name="Deprecation"></a>Deprecation </h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "set_deprecation_func"></a>
+    <strong>set_deprecation_func (func)</strong>
+    </dt>
+    <dd>
+    Sets a deprecation warning function.
+ An application can override this function to support proper output of
+ deprecation warnings. The warnings can be generated from libraries or
+ functions by calling <a href="../libraries/pl.utils.html#raise_deprecation">utils.raise_deprecation</a>. The default function
+ will write to the 'warn' system (introduced in Lua 5.4, or the compatibility
+ function from the <a href="../libraries/pl.compat.html">compat</a> module for earlier versions).</p>
+
+<p> Note: only applications should set/change this function, libraries should not.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">func</span>
+         a callback with signature: <code>function(msg, trace)</code> both arguments are strings, the latter being optional.
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#raise_deprecation">utils.raise_deprecation</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="comment">-- write to the Nginx logs with OpenResty
+</span>utils.set_deprecation_func(<span class="keyword">function</span>(msg, trace)
+  ngx.log(ngx.WARN, msg, (trace <span class="keyword">and</span> (<span class="string">" "</span> .. trace) <span class="keyword">or</span> <span class="keyword">nil</span>))
+<span class="keyword">end</span>)
+
+<span class="comment">-- disable deprecation warnings
+</span>utils.set_deprecation_func()</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "raise_deprecation"></a>
+    <strong>raise_deprecation (opts)</strong>
+    </dt>
+    <dd>
+    raises a deprecation warning.
+ For options see the usage example below.</p>
+
+<p> Note: the <code>opts.deprecated_after</code> field is the last version in which
+ a feature or option was NOT YET deprecated! Because when writing the code it
+ is quite often not known in what version the code will land. But the last
+ released version is usually known.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">opts</span>
+         options table
+        </li>
+    </ul>
+
+
+
+    <h3>See also:</h3>
+    <ul>
+         <a href="../libraries/pl.utils.html#set_deprecation_func">utils.set_deprecation_func</a>
+    </ul>
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example">warn(<span class="string">"@on"</span>)   <span class="comment">-- enable Lua warnings, they are usually off by default
+</span>
+<span class="keyword">function</span> stringx.islower(str)
+  raise_deprecation {
+    source = <span class="string">"Penlight "</span> .. utils._VERSION,                   <span class="comment">-- optional
+</span>    message = <span class="string">"function 'islower' was renamed to 'is_lower'"</span>, <span class="comment">-- required
+</span>    version_removed = <span class="string">"2.0.0"</span>,                                <span class="comment">-- optional
+</span>    deprecated_after = <span class="string">"1.2.3"</span>,                               <span class="comment">-- optional
+</span>    no_trace = <span class="keyword">true</span>,                                          <span class="comment">-- optional
+</span>  }
+  <span class="keyword">return</span> stringx.is_lower(str)
+<span class="keyword">end</span>
+<span class="comment">-- output: "[Penlight 1.9.2] function 'islower' was renamed to 'is_lower' (deprecated after 1.2.3, scheduled for removal in 2.0.0)"</span></pre>
+    </ul>
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/libraries/pl.xml.html b/Data/Libraries/Penlight/docs/libraries/pl.xml.html
new file mode 100644
index 0000000..fb280ab
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/libraries/pl.xml.html
@@ -0,0 +1,835 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Functions">Functions</a></li>
+</ul>
+
+
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><strong>pl.xml</strong></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+<h1>Module <code>pl.xml</code></h1>
+<p>XML LOM Utilities.</p>
+<p> This implements some useful things on <a href="http://matthewwild.co.uk/projects/luaexpat/lom.html">LOM</a> documents, such as returned by <code>lxp.lom.parse</code>.
+ In particular, it can convert LOM back into XML text, with optional pretty-printing control.
+ It is s based on stanza.lua from <a href="http://hg.prosody.im/trunk/file/4621c92d2368/util/stanza.lua">Prosody</a></p>
+
+
+<pre>
+&gt; d = xml.parse <span class="string">"&lt;nodes&gt;&lt;node id='1'&gt;alice&lt;/node&gt;&lt;/nodes&gt;"</span>
+&gt; = d
+&lt;nodes&gt;&lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;&lt;/nodes&gt;
+&gt; = xml.<span class="global">tostring</span>(d,<span class="string">''</span>,<span class="string">'  '</span>)
+&lt;nodes&gt;
+   &lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;
+&lt;/nodes&gt;
+</pre>
+
+<p> Can be used as a lightweight one-stop-shop for simple XML processing; a simple XML parser is included
+ but the default is to use <code>lxp.lom</code> if it can be found.
+ <pre>
+ Prosody IM
+ Copyright (C) 2008-2010 Matthew Wild
+ Copyright (C) 2008-2010 Waqas Hussain--
+ classic Lua XML parser by Roberto Ierusalimschy.
+ modified to output LOM format.
+ http://lua-users.org/wiki/LuaXml
+ </pre>
+ See <a href="../manual/06-data.md.html#XML">the Guide</a></p>
+
+<p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a></p>
+
+<p> Soft Dependencies: <code>lxp.lom</code> (fallback is to use basic Lua parser)</p>
+
+
+<h2><a href="#Functions">Functions</a></h2>
+<table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#new">new (tag, attr)</a></td>
+	<td class="summary">create a new document node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#parse">parse (text_or_file, is_file, use_basic)</a></td>
+	<td class="summary">parse an XML document.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:addtag">Doc:addtag (tag, attrs)</a></td>
+	<td class="summary">convenient function to add a document node, This updates the last inserted position.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:text">Doc:text (text)</a></td>
+	<td class="summary">convenient function to add a text node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:up">Doc:up ()</a></td>
+	<td class="summary">go up one level in a document</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:add_direct_child">Doc:add_direct_child (child)</a></td>
+	<td class="summary">append a child to a document directly.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:add_child">Doc:add_child (child)</a></td>
+	<td class="summary">append a child to a document at the last element added</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:set_attribs">Doc:set_attribs (t)</a></td>
+	<td class="summary">set attributes of a document node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:set_attrib">Doc:set_attrib (a, v)</a></td>
+	<td class="summary">set a single attribute of a document node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:get_attribs">Doc:get_attribs ()</a></td>
+	<td class="summary">access the attributes of a document node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#elem">elem (tag, items)</a></td>
+	<td class="summary">function to create an element with a given tag name and a set of children.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#tags">tags (list)</a></td>
+	<td class="summary">given a list of names, return a number of element constructors.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc.subst">Doc.subst (templ, data)</a></td>
+	<td class="summary">create a substituted copy of a document,</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:child_with_name">Doc:child_with_name (tag)</a></td>
+	<td class="summary">get the first child with a given tag name.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:get_elements_with_name">Doc:get_elements_with_name (tag, dont_recurse)</a></td>
+	<td class="summary">get all elements in a document that have a given tag.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:childtags">Doc:childtags ()</a></td>
+	<td class="summary">iterate over all child elements of a document node.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:maptags">Doc:maptags (callback)</a></td>
+	<td class="summary">visit child element  of a node and call a function, possibility modifying the document.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#tostring">tostring (t, idn, indent, attr_indent, xml)</a></td>
+	<td class="summary">pretty-print an XML document</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#Doc:get_text">Doc:get_text ()</a></td>
+	<td class="summary">get the full text value of an element</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#clone">clone (doc, strsubst)</a></td>
+	<td class="summary">make a copy of a document</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#compare">compare (t1, t2)</a></td>
+	<td class="summary">compare two documents.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#is_tag">is_tag (d)</a></td>
+	<td class="summary">is this value a document element?</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#walk">walk (doc, depth_first, operation)</a></td>
+	<td class="summary">call the desired function recursively over the document.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#parsehtml">parsehtml (s)</a></td>
+	<td class="summary">Parse a well-formed HTML file as a string.</td>
+	</tr>
+	<tr>
+	<td class="name" nowrap><a href="#basic_parse">basic_parse (s, all_text, html)</a></td>
+	<td class="summary">Parse a simple XML document using a pure Lua parser based on Robero Ierusalimschy's original version.</td>
+	</tr>
+</table>
+
+<br/>
+<br/>
+
+
+    <h2 class="section-header "><a name="Functions"></a>Functions</h2>
+
+    <dl class="function">
+    <dt>
+    <a name = "new"></a>
+    <strong>new (tag, attr)</strong>
+    </dt>
+    <dd>
+    create a new document node.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tag</span>
+         the tag name
+        </li>
+        <li><span class="parameter">attr</span>
+         optional attributes (table of name-value pairs)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "parse"></a>
+    <strong>parse (text_or_file, is_file, use_basic)</strong>
+    </dt>
+    <dd>
+    parse an XML document.   By default, this uses lxp.lom.parse, but
+ falls back to basic<em>parse, or if use</em>basic is true
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">text_or_file</span>
+          file or string representation
+        </li>
+        <li><span class="parameter">is_file</span>
+         whether text<em>or</em>file is a file name or not
+        </li>
+        <li><span class="parameter">use_basic</span>
+         do a basic parse
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+        <li>
+        a parsed LOM document with the document metatatables set</li>
+        <li>
+        nil, error the error can either be a file error or a parse error</li>
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:addtag"></a>
+    <strong>Doc:addtag (tag, attrs)</strong>
+    </dt>
+    <dd>
+    convenient function to add a document node, This updates the last inserted position.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tag</span>
+         a tag name
+        </li>
+        <li><span class="parameter">attrs</span>
+         optional set of attributes (name-string pairs)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:text"></a>
+    <strong>Doc:text (text)</strong>
+    </dt>
+    <dd>
+    convenient function to add a text node.   This updates the last inserted position.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">text</span>
+         a string
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:up"></a>
+    <strong>Doc:up ()</strong>
+    </dt>
+    <dd>
+    go up one level in a document
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:add_direct_child"></a>
+    <strong>Doc:add_direct_child (child)</strong>
+    </dt>
+    <dd>
+    append a child to a document directly.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">child</span>
+         a child node (either text or a document)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:add_child"></a>
+    <strong>Doc:add_child (child)</strong>
+    </dt>
+    <dd>
+    append a child to a document at the last element added
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">child</span>
+         a child node (either text or a document)
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:set_attribs"></a>
+    <strong>Doc:set_attribs (t)</strong>
+    </dt>
+    <dd>
+    set attributes of a document node.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         a table containing attribute/value pairs
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:set_attrib"></a>
+    <strong>Doc:set_attrib (a, v)</strong>
+    </dt>
+    <dd>
+    set a single attribute of a document node.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">a</span>
+         attribute
+        </li>
+        <li><span class="parameter">v</span>
+         its value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:get_attribs"></a>
+    <strong>Doc:get_attribs ()</strong>
+    </dt>
+    <dd>
+    access the attributes of a document node.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "elem"></a>
+    <strong>elem (tag, items)</strong>
+    </dt>
+    <dd>
+    function to create an element with a given tag name and a set of children.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tag</span>
+         a tag name
+        </li>
+        <li><span class="parameter">items</span>
+         either text or a table where the hash part is the attributes and the list part is the children.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "tags"></a>
+    <strong>tags (list)</strong>
+    </dt>
+    <dd>
+    given a list of names, return a number of element constructors.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">list</span>
+          a list of names, or a comma-separated string.
+        </li>
+    </ul>
+
+
+
+
+    <h3>Usage:</h3>
+    <ul>
+        <pre class="example"><span class="keyword">local</span> parent,children = doc.tags <span class="string">'parent,children'</span> &lt;br&gt;
+  doc = parent {child <span class="string">'one'</span>, child <span class="string">'two'</span>}</pre>
+    </ul>
+
+</dd>
+    <dt>
+    <a name = "Doc.subst"></a>
+    <strong>Doc.subst (templ, data)</strong>
+    </dt>
+    <dd>
+    create a substituted copy of a document,
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">templ</span>
+          may be a document or a string representation which will be parsed and cached
+        </li>
+        <li><span class="parameter">data</span>
+          a table of name-value pairs or a list of such tables
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        an XML document
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:child_with_name"></a>
+    <strong>Doc:child_with_name (tag)</strong>
+    </dt>
+    <dd>
+    get the first child with a given tag name.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tag</span>
+         the tag name
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:get_elements_with_name"></a>
+    <strong>Doc:get_elements_with_name (tag, dont_recurse)</strong>
+    </dt>
+    <dd>
+    get all elements in a document that have a given tag.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">tag</span>
+         a tag name
+        </li>
+        <li><span class="parameter">dont_recurse</span>
+         optionally only return the immediate children with this tag name
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a list of elements
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:childtags"></a>
+    <strong>Doc:childtags ()</strong>
+    </dt>
+    <dd>
+    iterate over all child elements of a document node.
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:maptags"></a>
+    <strong>Doc:maptags (callback)</strong>
+    </dt>
+    <dd>
+    visit child element  of a node and call a function, possibility modifying the document.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">callback</span>
+          a function passed the node (text or element). If it returns nil, that node will be removed.
+ If it returns a value, that will replace the current node.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "tostring"></a>
+    <strong>tostring (t, idn, indent, attr_indent, xml)</strong>
+    </dt>
+    <dd>
+    pretty-print an XML document
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t</span>
+         an XML document
+        </li>
+        <li><span class="parameter">idn</span>
+         an initial indent (indents are all strings)
+        </li>
+        <li><span class="parameter">indent</span>
+         an indent for each level
+        </li>
+        <li><span class="parameter">attr_indent</span>
+         if given, indent each attribute pair and put on a separate line
+        </li>
+        <li><span class="parameter">xml</span>
+         force prefacing with default or custom <?xml...>
+        </li>
+    </ul>
+
+    <h3>Returns:</h3>
+    <ol>
+
+        a string representation
+    </ol>
+
+
+
+
+</dd>
+    <dt>
+    <a name = "Doc:get_text"></a>
+    <strong>Doc:get_text ()</strong>
+    </dt>
+    <dd>
+    get the full text value of an element
+
+
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "clone"></a>
+    <strong>clone (doc, strsubst)</strong>
+    </dt>
+    <dd>
+    make a copy of a document
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">doc</span>
+         the original document
+        </li>
+        <li><span class="parameter">strsubst</span>
+         an optional function for handling string copying which could do substitution, etc.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "compare"></a>
+    <strong>compare (t1, t2)</strong>
+    </dt>
+    <dd>
+    compare two documents.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">t1</span>
+         any value
+        </li>
+        <li><span class="parameter">t2</span>
+         any value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "is_tag"></a>
+    <strong>is_tag (d)</strong>
+    </dt>
+    <dd>
+    is this value a document element?
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">d</span>
+         any value
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "walk"></a>
+    <strong>walk (doc, depth_first, operation)</strong>
+    </dt>
+    <dd>
+    call the desired function recursively over the document.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">doc</span>
+         the document
+        </li>
+        <li><span class="parameter">depth_first</span>
+          visit child notes first, then the current node
+        </li>
+        <li><span class="parameter">operation</span>
+         a function which will receive the current tag name and current node.
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "parsehtml"></a>
+    <strong>parsehtml (s)</strong>
+    </dt>
+    <dd>
+    Parse a well-formed HTML file as a string.
+ Tags are case-insenstive, DOCTYPE is ignored, and empty elements can be .. empty.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the HTML
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+    <dt>
+    <a name = "basic_parse"></a>
+    <strong>basic_parse (s, all_text, html)</strong>
+    </dt>
+    <dd>
+    Parse a simple XML document using a pure Lua parser based on Robero Ierusalimschy's original version.
+
+
+    <h3>Parameters:</h3>
+    <ul>
+        <li><span class="parameter">s</span>
+         the XML document to be parsed.
+        </li>
+        <li><span class="parameter">all_text</span>
+          if true, preserves all whitespace. Otherwise only text containing non-whitespace is included.
+        </li>
+        <li><span class="parameter">html</span>
+         if true, uses relaxed HTML rules for parsing
+        </li>
+    </ul>
+
+
+
+
+
+</dd>
+</dl>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/01-introduction.md.html b/Data/Libraries/Penlight/docs/manual/01-introduction.md.html
new file mode 100644
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--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/01-introduction.md.html
@@ -0,0 +1,843 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Purpose">Purpose </a></li>
+<li><a href="#To_Inject_or_not_to_Inject_">To Inject or not to Inject? </a></li>
+<li><a href="#What_are_function_arguments_in_Penlight_">What are function arguments in Penlight? </a></li>
+<li><a href="#Pros_and_Cons_of_Loopless_Programming">Pros and Cons of Loopless Programming </a></li>
+<li><a href="#Generally_useful_functions">Generally useful functions </a></li>
+<li><a href="#Application_Support">Application Support </a></li>
+<li><a href="#Simplifying_Object_Oriented_Programming_in_Lua">Simplifying Object-Oriented Programming in Lua </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><strong>Introduction</strong></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Introduction</h2>
+
+<p><a name="Purpose"></a></p>
+<h3>Purpose</h3>
+
+<p>It is often said of Lua that it does not include batteries. That is because the
+goal of Lua is to produce a lean expressive language that will be used on all
+sorts of machines, (some of which don't even have hierarchical filesystems). The
+Lua language is the equivalent of an operating system kernel; the creators of Lua
+do not see it as their responsibility to create a full software ecosystem around
+the language. That is the role of the community.</p>
+
+<p>A principle of software design is to recognize common patterns and reuse them. If
+you find yourself writing things like `io.write(string.format('the answer is %d
+',42))` more than a number of times then it becomes useful just to define a
+function <code>printf</code>. This is good, not just because repeated code is harder to
+maintain, but because such code is easier to read, once people understand your
+libraries.</p>
+
+<p>Penlight captures many such code patterns, so that the intent of your code
+becomes clearer. For instance, a Lua idiom to copy a table is <code>{unpack(t)}</code>, but
+this will only work for 'small' tables (for a given value of 'small') so it is
+not very robust. Also, the intent is not clear. So <a href="../libraries/pl.tablex.html#deepcopy">tablex.deepcopy</a> is provided,
+which will also copy nested tables and and associated metatables, so it can be
+used to clone complex objects.</p>
+
+<p>The default error handling policy follows that of the Lua standard libraries: if
+a argument is the wrong type, then an error will be thrown, but otherwise we
+return <code>nil,message</code> if there is a problem. There are some exceptions; functions
+like <a href="../libraries/pl.input.html#fields">input.fields</a> default to shutting down the program immediately with a
+useful message. This is more appropriate behaviour for a <em>script</em> than providing
+a stack trace. (However, this default can be changed.) The lexer functions always
+throw errors, to simplify coding, and so should be wrapped in <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pcall">pcall</a>.</p>
+
+<p>If you are used to Python conventions, please note that all indices consistently
+start at 1.</p>
+
+<p>The Lua function <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.foreach">table.foreach</a> has been deprecated in favour of the <code>for in</code>
+statement, but such an operation becomes particularly useful with the
+higher-order function support in Penlight. Note that <a href="../libraries/pl.tablex.html#foreach">tablex.foreach</a> reverses
+the order, so that the function is passed the value and then the key. Although
+perverse, this matches the intended use better.</p>
+
+<p>The only important external dependence of Penlight is
+<a href="http://keplerproject.github.com/luafilesystem/manual.html">LuaFileSystem</a>
+(<a href="http://stevedonovan.github.io/lua-stdlibs/modules/lfs.html">lfs</a>), and if you want <a href="../libraries/pl.dir.html#copyfile">dir.copyfile</a> to work cleanly on Windows, you will need
+either <a href="http://alien.luaforge.net/">alien</a> or be using
+<a href="http://luajit.org">LuaJIT</a> as well. (The fallback is to call the equivalent
+shell commands.)</p>
+
+<p><a name="To_Inject_or_not_to_Inject_"></a></p>
+<h3>To Inject or not to Inject?</h3>
+
+<p>It was realized a long time ago that large programs needed a way to keep names
+distinct by putting them into tables (Lua), namespaces (C++) or modules
+(Python).  It is obviously impossible to run a company where everyone is called
+'Bruce', except in Monty Python skits. These 'namespace clashes' are more of a
+problem in a simple language like Lua than in C++, because C++ does more
+complicated lookup over 'injected namespaces'.  However, in a small group of
+friends, 'Bruce' is usually unique, so in particular situations it's useful to
+drop the formality and not use last names. It depends entirely on what kind of
+program you are writing, whether it is a ten line script or a ten thousand line
+program.</p>
+
+<p>So the Penlight library provides the formal way and the informal way, without
+imposing any preference. You can do it formally like:</p>
+
+
+<pre>
+<span class="keyword">local</span> utils = <span class="global">require</span> <span class="string">'pl.utils'</span>
+utils.printf(<span class="string">"%s\n"</span>,<span class="string">"hello, world!"</span>)
+</pre>
+
+<p>or informally like:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+utils.printf(<span class="string">"%s\n"</span>,<span class="string">"That feels better"</span>)
+</pre>
+
+<p><code>require &apos;pl&apos;</code> makes all the separate Penlight modules available, without needing
+to require them each individually.</p>
+
+<p>Generally, the formal way is better when writing modules, since then there are no
+global side-effects and the dependencies of your module are made explicit.</p>
+
+<p>Andrew Starks has contributed another way, which balances nicely between the
+formal need to keep the global table uncluttered and the informal need for
+convenience. <code>require&apos;pl.import_into&apos;</code> returns a function, which accepts a table
+for injecting Penlight into, or if no table is given, it passes back a new one.</p>
+
+
+<pre>
+<span class="keyword">local</span> pl = <span class="global">require</span><span class="string">'pl.import_into'</span>()
+</pre>
+
+<p>The table <a href="../libraries/pl.html#">pl</a> is a 'lazy table' which loads modules as needed, so we can then
+use <a href="../libraries/pl.utils.html#printf">pl.utils.printf</a> and so forth, without an explicit `require' or harming any
+globals.</p>
+
+<p>If you are using <code>_ENV</code> with Lua 5.2 to define modules, then here is a way to
+make Penlight available within a module:</p>
+
+
+<pre>
+<span class="keyword">local</span> _ENV,M = <span class="global">require</span> <span class="string">'pl.import_into'</span> ()
+
+<span class="keyword">function</span> answer ()
+    <span class="comment">-- all the Penlight modules are available!
+</span>    <span class="keyword">return</span> pretty.write(utils.split <span class="string">'10 20  30'</span>, <span class="string">''</span>)
+<span class="keyword">end</span>
+
+<span class="keyword">return</span> M
+</pre>
+
+<p>The default is to put Penlight into <code>\_ENV</code>, which has the unintended effect of
+making it available from the module (much as <code>module(...,package.seeall)</code> does).
+To satisfy both convenience and safety, you may pass <code>true</code> to this function, and
+then the <em>module</em> <code>M</code> is not the same as <code>\_ENV</code>, but only contains the exported
+functions.</p>
+
+<p>Otherwise, Penlight will <em>not</em> bring in functions into the global table, or
+clobber standard tables like 'io'.  require('pl') will bring tables like
+'utils','tablex',etc into the global table <em>if they are used</em>. This
+'load-on-demand' strategy ensures that the whole kitchen sink is not loaded up
+front,  so this method is as efficient as explicitly loading required modules.</p>
+
+<p>You have an option to bring the <a href="../libraries/pl.stringx.html#">pl.stringx</a> methods into the standard string
+table. All strings have a metatable that allows for automatic lookup in <a href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a>,
+so we can say <code>s:upper()</code>. Importing <a href="../libraries/pl.stringx.html#">stringx</a> allows for its functions to also
+be called as methods: <code>s:strip()</code>,etc:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+stringx.import()
+</pre>
+
+<p>or, more explicitly:</p>
+
+
+<pre>
+<span class="global">require</span>(<span class="string">'pl.stringx'</span>).import()
+</pre>
+
+<p>A more delicate operation is importing tables into the local environment. This is
+convenient when the context makes the meaning of a name very clear:</p>
+
+
+<pre>
+&gt; <span class="global">require</span> <span class="string">'pl'</span>
+&gt; utils.import(<span class="global">math</span>)
+&gt; = sin(<span class="number">1.2</span>)
+<span class="number">0.93203908596723</span>
+</pre>
+
+<p><a href="../libraries/pl.utils.html#import">utils.import</a> can also be passed a module name as a string, which is first
+required and then imported. If used in a module, <code>import</code> will bring the symbols
+into the module context.</p>
+
+<p>Keeping the global scope simple is very necessary with dynamic languages. Using
+global variables in a big program is always asking for trouble, especially since
+you do  not have the spell-checking provided by a compiler. The <a href="../libraries/pl.strict.html#">pl.strict</a>
+module enforces a simple rule: globals must be 'declared'.  This means that they
+must be assigned before use; assigning to <code>nil</code> is sufficient.</p>
+
+
+<pre>
+&gt; <span class="global">require</span> <span class="string">'pl.strict'</span>
+&gt; <span class="global">print</span>(x)
+stdin:<span class="number">1</span>: variable <span class="string">'x'</span> is <span class="keyword">not</span> declared
+&gt; x = <span class="keyword">nil</span>
+&gt; <span class="global">print</span>(x)
+<span class="keyword">nil</span>
+</pre>
+
+<p>The <a href="../libraries/pl.strict.html#">strict</a> module provided by Penlight is compatible with the 'load-on-demand'
+scheme used by <code>require &apos;pl</code>.</p>
+
+<p><a href="../libraries/pl.strict.html#">strict</a> also disallows assignment to global variables, except in the main
+program. Generally, modules have no business messing with global scope; if you
+must do it, then use a call to <a href="https://www.lua.org/manual/5.1/manual.html#pdf-rawset">rawset</a>. Similarly, if you have to check for the
+existence of a global, use <a href="https://www.lua.org/manual/5.1/manual.html#pdf-rawget">rawget</a>.</p>
+
+<p>If you wish to enforce strictness globally, then just add <code>require &apos;pl.strict&apos;</code>
+at the end of <code>pl/init.lua</code>, otherwise call it from your main program.</p>
+
+<p>As from 1.1.0, this module provides a <a href="../libraries/pl.strict.html#module">strict.module</a> function which creates (or
+modifies) modules so that accessing an unknown function or field causes an error.</p>
+
+<p>For example,</p>
+
+
+<pre>
+<span class="comment">-- mymod.lua
+</span><span class="keyword">local</span> strict = <span class="global">require</span> <span class="string">'pl.strict'</span>
+<span class="keyword">local</span> M = strict.<span class="global">module</span> (...)
+
+<span class="keyword">function</span> M.answer ()
+    <span class="keyword">return</span> <span class="number">42</span>
+<span class="keyword">end</span>
+
+<span class="keyword">return</span> M
+</pre>
+
+<p>If you were to accidently type <code>mymod.Answer()</code>, then you would get a runtime
+error: "variable 'Answer' is not declared in 'mymod'".</p>
+
+<p>This can be applied to existing modules. You may desire to have the same level
+of checking for the Lua standard libraries:</p>
+
+
+<pre>
+strict.make_all_strict(_G)
+</pre>
+
+<p>Thereafter a typo such as <code>math.cosine</code> will give you an explicit error, rather
+than merely returning a <code>nil</code> that will cause problems later.</p>
+
+<p><a name="What_are_function_arguments_in_Penlight_"></a></p>
+<h3>What are function arguments in Penlight?</h3>
+
+<p>Many functions in Penlight themselves take function arguments, like <code>map</code> which
+applies a function to a list, element by element.  You can use existing
+functions, like <a href="https://www.lua.org/manual/5.1/manual.html#pdf-math.max">math.max</a>, anonymous functions (like `function(x,y) return x > y
+end<code> ), or operations by name (e.g &apos;*&apos; or &apos;..&apos;).  The module </code>pl.operator` exports
+all the standard Lua operations, like the Python module of the same name.
+Penlight allows these to be referred to by name, so <a href="../libraries/pl.operator.html#gt">operator.gt</a> can be more
+concisely expressed as '>'.</p>
+
+<p>Note that the <code>map</code> functions pass any extra arguments to the function, so we can
+have <code>ls:filter(&apos;&gt;&apos;,0)</code>, which is a shortcut for
+<code>ls:filter(function(x) return x &gt; 0 end)</code>.</p>
+
+<p>Finally, <a href="../libraries/pl.func.html#">pl.func</a> supports <em>placeholder expressions</em> in the Boost lambda style,
+so that an anonymous function to multiply the two arguments can be expressed as
+<code>\<em>1*\</em>2</code>.</p>
+
+<p>To use them directly, note that <em>all</em> function arguments in Penlight go through
+<a href="../libraries/pl.utils.html#function_arg">utils.function_arg</a>. <a href="../libraries/pl.func.html#">pl.func</a> registers itself with this function, so that you
+can directly use placeholder expressions with standard methods:</p>
+
+
+<pre>
+&gt; _1 = func._1
+&gt; = List{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}:map(_1+<span class="number">1</span>)
+{<span class="number">11</span>,<span class="number">21</span>,<span class="number">31</span>}
+</pre>
+
+<p>Another option for short anonymous functions is provided by
+<a href="../libraries/pl.utils.html#string_lambda">utils.string_lambda</a>; this is invoked automatically:</p>
+
+
+<pre>
+&gt; = List{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}:map <span class="string">'|x| x + 1'</span>
+{<span class="number">11</span>,<span class="number">21</span>,<span class="number">31</span>}
+</pre>
+
+<p><a name="Pros_and_Cons_of_Loopless_Programming"></a></p>
+<h3>Pros and Cons of Loopless Programming</h3>
+
+<p>The standard loops-and-ifs 'imperative' style of programming is dominant, and
+often seems to be the 'natural' way of telling a machine what to do. It is in
+fact very much how the machine does things, but we need to take a step back and
+find ways of expressing solutions in a higher-level way.  For instance, applying
+a function to all elements of a list is a common operation:</p>
+
+
+<pre>
+<span class="keyword">local</span> res = {}
+<span class="keyword">for</span> i = <span class="number">1</span>,#ls <span class="keyword">do</span>
+    res[i] = fun(ls[i])
+<span class="keyword">end</span>
+</pre>
+
+<p>This can be efficiently and succintly expressed as <code>ls:map(fun)</code>. Not only is
+there less typing but the intention of the code is clearer. If readers of your
+code spend too much time trying to guess your intention by analyzing your loops,
+then you have failed to express yourself clearly. Similarly, <code>ls:filter(&apos;&gt;&apos;,0)</code>
+will give you all the values in a list greater than zero. (Of course, if you
+don't feel like using <a href="../classes/pl.List.html#">List</a>, or have non-list-like tables, then <a href="../libraries/pl.tablex.html#">pl.tablex</a>
+offers the same facilities. In fact, the <a href="../classes/pl.List.html#">List</a> methods are implemented using
+<a href="../libraries/pl.tablex.html#">tablex</a> functions.)</p>
+
+<p>A common observation is that loopless programming is less efficient, particularly
+in the way it uses memory. <code>ls1:map2(&apos;*&apos;,ls2):reduce &apos;+&apos;</code> will give you the dot
+product of two lists, but an unnecessary temporary list is created.  But
+efficiency is relative to the actual situation, it may turn out to be <em>fast
+enough</em>, or may not appear in any crucial inner loops, etc.</p>
+
+<p>Writing loops is 'error-prone and tedious', as Stroustrup says. But any
+half-decent editor can be taught to do much of that typing for you. The question
+should actually be: is it tedious to <em>read</em> loops?  As with natural language,
+programmers tend to read chunks at a time. A for-loop causes no surprise, and
+probably little brain activity. One argument for loopless programming is the
+loops that you <em>do</em> write stand out more, and signal 'something different
+happening here'.  It should not be an all-or-nothing thing, since most programs
+require a mixture of idioms that suit the problem.  Some languages (like APL) do
+nearly everything with map and reduce operations on arrays, and so solutions can
+sometimes seem forced. Wisdom is knowing when a particular idiom makes a
+particular problem easy to <em>solve</em> and the solution easy to <em>explain</em> afterwards.</p>
+
+<p><a name="Generally_useful_functions_"></a></p>
+<h3>Generally useful functions.</h3>
+
+<p>The function <code>printf</code> discussed earlier is included in <a href="../libraries/pl.utils.html#">pl.utils</a> because it
+makes properly formatted output easier. (There is an equivalent <code>fprintf</code> which
+also takes a file object parameter, just like the C function.)</p>
+
+<p>Splitting a string using a delimiter is a fairly common operation, hence <code>split</code>.</p>
+
+<p>Utility functions like <code>is_type</code> help with identifying what
+kind of animal you are dealing with.
+The Lua <a href="https://www.lua.org/manual/5.1/manual.html#pdf-type">type</a> function handles the basic types, but can't distinguish between
+different kinds of objects, which are all tables. So <code>is_type</code> handles both
+cases, like <code>is_type(s,&quot;string&quot;)</code> and <code>is_type(ls,List)</code>.</p>
+
+<p>A common pattern when working with Lua varargs is capturing all the arguments in
+a table:</p>
+
+
+<pre>
+<span class="keyword">function</span> t(...)
+    <span class="keyword">local</span> args = {...}
+    ...
+<span class="keyword">end</span>
+</pre>
+
+<p>But this will bite you someday when <code>nil</code> is one of the arguments, since this
+will put a 'hole' in your table. In particular, <code>#ls</code> will only give you the size
+upto the <code>nil</code> value.  Hence the need for <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.pack">table.pack</a> - this is a new Lua 5.2
+function which Penlight defines also for Lua 5.1.</p>
+
+
+<pre>
+<span class="keyword">function</span> t(...)
+    <span class="keyword">local</span> args,n = <span class="global">table</span>.pack(...)
+    <span class="keyword">for</span> i = <span class="number">1</span>,n <span class="keyword">do</span>
+      ...
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>The 'memoize' pattern occurs when you have a function which is expensive to call,
+but will always return the same value subsequently. <a href="../libraries/pl.utils.html#memoize">utils.memoize</a> is given a
+function, and returns another function. This calls the function the first time,
+saves the value for that argument, and thereafter for that argument returns the
+saved value.  This is a more flexible alternative to building a table of values
+upfront, since in general you won't know what values are needed.</p>
+
+
+<pre>
+sum = utils.memoize(<span class="keyword">function</span>(n)
+    <span class="keyword">local</span> sum = <span class="number">0</span>
+    <span class="keyword">for</span> i = <span class="number">1</span>,n <span class="keyword">do</span> sum = sum + i <span class="keyword">end</span>
+    <span class="keyword">return</span> sum
+<span class="keyword">end</span>)
+...
+s = sum(<span class="number">1e8</span>) <span class="comment">--takes time!
+</span>...
+s = sum(<span class="number">1e8</span>) <span class="comment">--returned saved value!</span>
+</pre>
+
+<p>Penlight is fully compatible with Lua 5.1, 5.2 and LuaJIT 2. To ensure this,
+<a href="../libraries/pl.utils.html#">utils</a> also defines the global Lua 5.2
+<a href="http://www.lua.org/work/doc/manual.html#pdf-load">load</a> function as <code>utils.load</code></p>
+
+<ul>
+    <li>the input (either a string or a function)</li>
+    <li>the source name used in debug information</li>
+    <li>the mode is a string that can have either or both of 'b' or 't', depending on
+    whether the source is a binary chunk or text code (default is 'bt')</li>
+    <li>the environment for the compiled chunk</li>
+</ul>
+
+<p>Using <code>utils.load</code> should reduce the need to call the deprecated function <a href="https://www.lua.org/manual/5.1/manual.html#pdf-setfenv">setfenv</a>,
+and make your Lua 5.1 code 5.2-friendly.</p>
+
+<p>The <a href="../libraries/pl.utils.html#">utils</a> module exports <a href="https://www.lua.org/manual/5.1/manual.html#pdf-getfenv">getfenv</a> and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-setfenv">setfenv</a> for
+Lua 5.2 as well, based on code by Sergey Rozhenko.  Note that these functions can fail
+for functions which don't access any globals.</p>
+
+<p><a name="Application_Support"></a></p>
+<h3>Application Support</h3>
+
+<p><a href="../libraries/pl.app.html#parse_args">app.parse_args</a> is a simple command-line argument parser. If called without any
+arguments, it tries to use the global <code>arg</code> array.  It returns the <em>flags</em>
+(options begining with '-') as a table of name/value pairs, and the <em>arguments</em>
+as an array.  It knows about long GNU-style flag names, e.g. <code>--value</code>, and
+groups of short flags are understood, so that <code>-ab</code> is short for <code>-a -b</code>. The
+flags result would then look like <code>{value=true,a=true,b=true}</code>.</p>
+
+<p>Flags may take values. The command-line <code>--value=open -n10</code> would result in
+<code>{value=&apos;open&apos;,n=&apos;10&apos;}</code>; generally you can use '=' or ':' to separate the flag
+from its value, except in the special case where a short flag is followed by an
+integer.  Or you may specify upfront that some flags have associated values, and
+then the values will follow the flag.</p>
+
+
+<pre>
+&gt; <span class="global">require</span> <span class="string">'pl'</span>
+&gt; flags,args = app.parse_args({<span class="string">'-o'</span>,<span class="string">'fred'</span>,<span class="string">'-n10'</span>,<span class="string">'fred.txt'</span>},{o=<span class="keyword">true</span>})
+&gt; pretty.dump(flags)
+{o=<span class="string">'fred'</span>,n=<span class="string">'10'</span>}
+</pre>
+
+<p><code>parse_args</code> is not intelligent or psychic; it will not convert any flag values
+or arguments for you, or raise errors. For that, have a look at
+<a href="../manual/08-additional.md.html#Command_line_Programs_with_Lapp">Lapp</a>.</p>
+
+<p>An application which consists of several files usually cannot use <a href="https://www.lua.org/manual/5.1/manual.html#pdf-require">require</a> to
+load files in the same directory as the main script.  <code>app.require_here()</code>
+ensures that the Lua module path is modified so that files found locally are
+found first. In the <code>examples</code> directory, <a href="../examples/test-symbols.lua.html#">test-symbols.lua</a> uses this function
+to ensure that it can find <a href="../examples/symbols.lua.html#">symbols.lua</a> even if it is not run from this directory.</p>
+
+<p><a href="../libraries/pl.app.html#appfile">app.appfile</a> will create a filename that your application can use to store its
+private data, based on the script name. For example, <code>app.appfile &quot;test.txt&quot;</code>
+from a script called <code>testapp.lua</code> produces the following file on my Windows
+machine:</p>
+
+<pre><code>C:\Documents and Settings\SJDonova\.testapp\test.txt
+</code></pre>
+
+
+<p>and the equivalent on my Linux machine:</p>
+
+<pre><code>/home/sdonovan/.testapp/test.txt
+</code></pre>
+
+
+<p>If <code>.testapp</code> does not exist, it will be created.</p>
+
+<p>Penlight makes it convenient to save application data in Lua format. You can use
+<code>pretty.dump(t,file)</code> to write a Lua table in a human-readable form to a file,
+and <code>pretty.read(file.read(file))</code> to generate the table again, using the
+<a href="../libraries/pl.pretty.html#">pretty</a> module.</p>
+
+
+<p><a name="Simplifying_Object_Oriented_Programming_in_Lua"></a></p>
+<h3>Simplifying Object-Oriented Programming in Lua</h3>
+
+<p>Lua is similar to JavaScript in that the concept of class is not directly
+supported by the language. In fact, Lua has a very general mechanism for
+extending the behaviour of tables which makes it straightforward to implement
+classes. A table's behaviour is controlled by its metatable. If that metatable
+has a <code>\<em>\</em>index</code> function or table, this will handle looking up anything which is
+not found in the original table. A class is just a table with an <code>__index</code> key
+pointing to itself. Creating an object involves making a table and setting its
+metatable to the class; then when handling <code>obj.fun</code>, Lua first looks up <code>fun</code> in
+the table <code>obj</code>, and if not found it looks it up in the class. <code>obj:fun(a)</code> is
+just short for <code>obj.fun(obj,a)</code>. So with the metatable mechanism and this bit of
+syntactic sugar, it is straightforward to implement classic object orientation.</p>
+
+
+<pre>
+<span class="comment">-- animal.lua
+</span>
+class = <span class="global">require</span> <span class="string">'pl.class'</span>
+
+class.Animal()
+
+<span class="keyword">function</span> Animal:_init(name)
+    self.name = name
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> Animal:__tostring()
+  <span class="keyword">return</span> self.name..<span class="string">': '</span>..self:speak()
+<span class="keyword">end</span>
+
+class.Dog(Animal)
+
+<span class="keyword">function</span> Dog:speak()
+  <span class="keyword">return</span> <span class="string">'bark'</span>
+<span class="keyword">end</span>
+
+class.Cat(Animal)
+
+<span class="keyword">function</span> Cat:_init(name,breed)
+    self:super(name)  <span class="comment">-- must init base!
+</span>    self.breed = breed
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> Cat:speak()
+  <span class="keyword">return</span> <span class="string">'meow'</span>
+<span class="keyword">end</span>
+
+class.Lion(Cat)
+
+<span class="keyword">function</span> Lion:speak()
+  <span class="keyword">return</span> <span class="string">'roar'</span>
+<span class="keyword">end</span>
+
+fido = Dog(<span class="string">'Fido'</span>)
+felix = Cat(<span class="string">'Felix'</span>,<span class="string">'Tabby'</span>)
+leo = Lion(<span class="string">'Leo'</span>,<span class="string">'African'</span>)
+
+$ lua -i animal.lua
+&gt; = fido,felix,leo
+Fido: bark      Felix: meow     Leo: roar
+&gt; = leo:is_a(Animal)
+<span class="keyword">true</span>
+&gt; = leo:is_a(Dog)
+<span class="keyword">false</span>
+&gt; = leo:is_a(Cat)
+<span class="keyword">true</span>
+</pre>
+
+<p>All Animal does is define <code>\<em>\</em>tostring</code>, which Lua will use whenever a string
+representation is needed of the object. In turn, this relies on <code>speak</code>, which is
+not defined. So it's what C++ people would call an abstract base class; the
+specific derived classes like Dog define <code>speak</code>. Please note that <em>if</em> derived
+classes have their own constructors, they must explicitly call the base
+constructor for their base class; this is conveniently available as the <code>super</code>
+method.</p>
+
+<p>Note that (as always) there are multiple ways to implement OOP in Lua; this method
+uses the classic 'a class is the __index of its objects' but does 'fat inheritance';
+methods from the base class are copied into the new class. The advantage of this is
+that you are not penalized for long inheritance chains, for the price of larger classes,
+but generally objects outnumber classes! (If not, something odd is going on with your design.)</p>
+
+<p>All such objects will have a <code>is_a</code> method, which looks up the inheritance chain
+to find a match.  Another form is <code>class_of</code>, which can be safely called on all
+objects, so instead of <code>leo:is_a(Animal)</code> one can say <code>Animal:class_of(leo)</code>.</p>
+
+<p>There are two ways to define a class, either <code>class.Name()</code> or <code>Name = class()</code>;
+both work identically, except that the first form will always put the class in
+the current environment (whether global or module); the second form provides more
+flexibility about where to store the class. The first form does <em>name</em> the class
+by setting the <code>_name</code> field, which can be useful in identifying the objects of
+this type later. This session illustrates the usefulness of having named classes,
+if no <code>__tostring</code> method is explicitly defined.</p>
+
+
+<pre>
+&gt; class.Fred()
+&gt; a = Fred()
+&gt; = a
+Fred: <span class="number">00459330</span>
+&gt; Alice = class()
+&gt; b = Alice()
+&gt; = b
+<span class="global">table</span>: <span class="number">00459</span>AE8
+&gt; Alice._name = <span class="string">'Alice'</span>
+&gt; = b
+Alice: <span class="number">00459</span>AE8
+</pre>
+
+<p>So <code>Alice = class(); Alice._name = &apos;Alice&apos;</code> is exactly the same as <code>class.Alice()</code>.</p>
+
+<p>This useful notation is borrowed from Hugo Etchegoyen's
+<a href="http://lua-users.org/wiki/MultipleInheritanceClasses">classlib</a> which further
+extends this concept to allow for multiple inheritance. Notice that the
+more convenient form puts the class name in the <em>current environment</em>! That is,
+you may use it safely within modules using the old-fashioned <code>module()</code>
+or the new <code>_ENV</code> mechanism.</p>
+
+<p>There is always more than one way of doing things in Lua; some may prefer this
+style for creating classes:</p>
+
+
+<pre>
+<span class="keyword">local</span> class = <span class="global">require</span> <span class="string">'pl.class'</span>
+
+class.Named {
+    _init = <span class="keyword">function</span>(self,name)
+        self.name = name
+    <span class="keyword">end</span>;
+
+    __tostring = <span class="keyword">function</span>(self)
+        <span class="keyword">return</span> <span class="string">'boo '</span>..self.name
+    <span class="keyword">end</span>;
+}
+
+b = Named <span class="string">'dog'</span>
+<span class="global">print</span>(b)
+<span class="comment">--&gt; boo dog</span>
+</pre>
+
+<p>Note that you have to explicitly declare <code>self</code> and end each function definition
+with a semi-colon or comma, since this is a Lua table. To inherit from a base class,
+set the special field <code>_base</code> to the class in this table.</p>
+
+<p>Penlight provides a number of useful classes; there is <a href="../classes/pl.List.html#">List</a>, which is a Lua
+clone of the standard Python list object, and <a href="../classes/pl.Set.html#">Set</a> which represents sets. There
+are three kinds of <em>map</em> defined: <a href="../classes/pl.Map.html#">Map</a>, <a href="../classes/pl.MultiMap.html#">MultiMap</a> (where a key may have
+multiple values) and <a href="../classes/pl.OrderedMap.html#">OrderedMap</a> (where the order of insertion is remembered.).
+There is nothing special about these classes and you may inherit from them.</p>
+
+<p>A powerful thing about dynamic languages is that you can redefine existing classes
+and functions, which is often called 'monkey patching' It's entertaining and convenient,
+but ultimately anti-social; you may modify <a href="../classes/pl.List.html#">List</a> but then any other modules using
+this <em>shared</em> resource can no longer be sure about its behaviour. (This is why you
+must say <code>stringx.import()</code> explicitly if you want the extended string methods - it
+would be a bad default.)  Lua is particularly open to modification but the
+community is not as tolerant of monkey-patching as the Ruby community, say. You may
+wish to add some new methods to <a href="../classes/pl.List.html#">List</a>? Cool, but that's what subclassing is for.</p>
+
+
+<pre>
+class.Strings(List)
+
+<span class="keyword">function</span> Strings:my_method()
+...
+<span class="keyword">end</span>
+</pre>
+
+<p>It's definitely more useful to define exactly how your objects behave
+in <em>unknown</em> conditions. All classes have a <code>catch</code> method you can use to set
+a handler for unknown lookups; the function you pass looks exactly like the
+<code>__index</code> metamethod.</p>
+
+
+<pre>
+Strings:catch(<span class="keyword">function</span>(self,name)
+    <span class="keyword">return</span> <span class="keyword">function</span>() <span class="global">error</span>(<span class="string">"no such method "</span>..name,<span class="number">2</span>) <span class="keyword">end</span>
+<span class="keyword">end</span>)
+</pre>
+
+<p>In this case we're just customizing the error message, but
+creative things can be done. Consider this code from <code>test-vector.lua</code>:</p>
+
+
+<pre>
+Strings:catch(List.default_map_with(<span class="global">string</span>))
+
+ls = Strings{<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>}
+asserteq(ls:upper(),{<span class="string">'ONE'</span>,<span class="string">'TWO'</span>,<span class="string">'THREE'</span>})
+asserteq(ls:sub(<span class="number">1</span>,<span class="number">2</span>),{<span class="string">'on'</span>,<span class="string">'tw'</span>,<span class="string">'th'</span>})
+</pre>
+
+<p>So we've converted a unknown method invocation into a map using the function of
+that name found in <a href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a>.  So for a <code>Vector</code> (which is a specialization of <a href="../classes/pl.List.html#">List</a>
+for numbers) it makes sense to make <a href="https://www.lua.org/manual/5.1/manual.html#5.6">math</a> the default map so that <code>v:sin()</code> makes
+sense.</p>
+
+<p>Note that <code>map</code> operations return a object of the same type - this is often called
+<em>covariance</em>. So <code>ls:upper()</code> itself returns a <code>Strings</code> object.</p>
+
+<p>This is not <em>always</em> what you want, but objects can always be cast to the desired type.
+(<code>cast</code> doesn't create a new object, but returns the object passed.)</p>
+
+
+<pre>
+<span class="keyword">local</span> sizes = ls:map <span class="string">'#'</span>
+asserteq(sizes, {<span class="number">3</span>,<span class="number">3</span>,<span class="number">5</span>})
+asserteq(utils.<span class="global">type</span>(sizes),<span class="string">'Strings'</span>)
+asserteq(sizes:is_a(Strings),<span class="keyword">true</span>)
+sizes = Vector:cast(sizes)
+asserteq(utils.<span class="global">type</span>(sizes),<span class="string">'Vector'</span>)
+asserteq(sizes+<span class="number">1</span>,{<span class="number">4</span>,<span class="number">4</span>,<span class="number">6</span>})
+</pre>
+
+<p>About <code>utils.type</code>: it can only return a string for a class type if that class does
+in fact have a <code>_name</code> field.</p>
+
+
+<p><em>Properties</em> are a useful object-oriented pattern. We wish to control access to a
+field, but don't wish to force the user of the class to say <code>obj:get_field()</code>
+etc. This excerpt from <code>tests/test-class.lua</code> shows how it is done:</p>
+
+
+
+<pre>
+<span class="keyword">local</span> MyProps = class(class.properties)
+<span class="keyword">local</span> setted_a, got_b
+
+<span class="keyword">function</span> MyProps:_init ()
+    self._a = <span class="number">1</span>
+    self._b = <span class="number">2</span>
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> MyProps:set_a (v)
+    setted_a = <span class="keyword">true</span>
+    self._a = v
+<span class="keyword">end</span>
+
+<span class="keyword">function</span> MyProps:get_b ()
+    got_b = <span class="keyword">true</span>
+    <span class="keyword">return</span> self._b
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> mp = MyProps()
+
+mp.a = <span class="number">10</span>
+
+asserteq(mp.a,<span class="number">10</span>)
+asserteq(mp.b,<span class="number">2</span>)
+asserteq(setted_a <span class="keyword">and</span> got_b, <span class="keyword">true</span>)
+</pre>
+
+<p>The convention is that the internal field name is prefixed with an underscore;
+when reading <code>mp.a</code>, first a check for an explicit <em>getter</em> <code>get_a</code> and then only
+look for <code>_a</code>. Simularly, writing <code>mp.a</code> causes the <em>setter</em> <code>set_a</code> to be used.</p>
+
+<p>This is cool behaviour, but like much Lua metaprogramming, it is not free. Method
+lookup on such objects goes through <code>\<em>\</em>index</code> as before, but now <code>\<em>\</em>index</code> is a
+function which has to explicitly look up methods in the class, before doing any
+property indexing, which is not going to be as fast as field lookup. If however,
+your accessors actually do non-trivial things, then the extra overhead could be
+worth it.</p>
+
+<p>This is not really intended for <em>access control</em> because external code can write
+to <code>mp._a</code> directly. It is possible to have this kind of control in Lua, but it
+again comes with run-time costs.</p>
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/02-arrays.md.html b/Data/Libraries/Penlight/docs/manual/02-arrays.md.html
new file mode 100644
index 0000000..28dc6a2
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/02-arrays.md.html
@@ -0,0 +1,914 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Python_style_Lists">Python-style Lists </a></li>
+<li><a href="#Map_and_Set_classes">Map and Set classes </a></li>
+<li><a href="#Useful_Operations_on_Tables">Useful Operations on Tables </a></li>
+<li><a href="#Operations_on_two_dimensional_tables">Operations on two-dimensional tables </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><strong>Tables and Arrays</strong></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Tables and Arrays</h2>
+
+<p><a id="list"/></p>
+
+<p><a name="Python_style_Lists"></a></p>
+<h3>Python-style Lists</h3>
+
+<p>One of the elegant things about Lua is that tables do the job of both lists and
+dicts (as called in Python) or vectors and maps, (as called in C++), and they do
+it efficiently.  However, if we are dealing with 'tables with numerical indices'
+we may as well call them lists and look for operations which particularly make
+sense for lists. The Penlight <a href="../classes/pl.List.html#">List</a> class was originally written by Nick Trout
+for Lua 5.0, and translated to 5.1 and extended by myself.  It seemed that
+borrowing from Python was a good idea, and this eventually grew into Penlight.</p>
+
+<p>Here is an example showing <a href="../classes/pl.List.html#">List</a> in action; it redefines <code>__tostring</code>, so that
+it can print itself out more sensibly:</p>
+
+
+<pre>
+&gt; List = <span class="global">require</span> <span class="string">'pl.List'</span>  <span class="comment">--&gt; automatic with require 'pl' &lt;---
+</span>&gt; l = List()
+&gt; l:append(<span class="number">10</span>)
+&gt; l:append(<span class="number">20</span>)
+&gt; = l
+{<span class="number">10</span>,<span class="number">20</span>}
+&gt; l:extend {<span class="number">30</span>,<span class="number">40</span>}
+{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; l:insert(<span class="number">1</span>,<span class="number">5</span>)
+{<span class="number">5</span>,<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = l:pop()
+<span class="number">40</span>
+&gt; = l
+{<span class="number">5</span>,<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+&gt; = l:index(<span class="number">30</span>)
+<span class="number">4</span>
+&gt; = l:contains(<span class="number">30</span>)
+<span class="keyword">true</span>
+&gt; = l:reverse()  <span class="comment">---&gt; note: doesn't make a copy!
+</span>{<span class="number">30</span>,<span class="number">20</span>,<span class="number">10</span>,<span class="number">5</span>}
+</pre>
+
+<p>Although methods like <code>sort</code> and <code>reverse</code> operate in-place and change the list,
+they do return the original list. This makes it possible to do <em>method chaining</em>,
+like <code>ls = ls:append(10):append(20):reverse():append(1)</code>. But (and this is an
+important but) no extra copy is made, so <code>ls</code> does not change identity. <a href="../classes/pl.List.html#">List</a>
+objects (like tables) are <em>mutable</em>, unlike strings. If you want a copy of a
+list, then <code>List(ls)</code> will do the job, i.e. it acts like a copy constructor.
+However, if passed any other table, <a href="../classes/pl.List.html#">List</a> will just set the metatable of the
+table and <em>not</em> make a copy.</p>
+
+<p>A particular feature of Python lists is <em>slicing</em>. This is fully supported in
+this version of <a href="../classes/pl.List.html#">List</a>, except we use 1-based indexing. So <a href="../classes/pl.List.html#List:slice">List.slice</a> works
+rather like <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.sub">string.sub</a>:</p>
+
+
+<pre>
+&gt; l = List {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = l:slice(<span class="number">1</span>,<span class="number">1</span>)  <span class="comment">---&gt; note: creates a new list!
+</span>{<span class="number">10</span>}
+&gt; = l:slice(<span class="number">2</span>,<span class="number">2</span>)
+{<span class="number">20</span>}
+&gt; = l:slice(<span class="number">2</span>,<span class="number">3</span>)
+{<span class="number">20</span>,<span class="number">30</span>}
+&gt; = l:slice(<span class="number">2</span>,-<span class="number">2</span>)
+{<span class="number">20</span>,<span class="number">30</span>}
+&gt; = l:slice_assign(<span class="number">2</span>,<span class="number">2</span>,{<span class="number">21</span>,<span class="number">22</span>,<span class="number">23</span>})
+{<span class="number">10</span>,<span class="number">21</span>,<span class="number">22</span>,<span class="number">23</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = l:chop(<span class="number">1</span>,<span class="number">1</span>)
+{<span class="number">21</span>,<span class="number">22</span>,<span class="number">23</span>,<span class="number">30</span>,<span class="number">40</span>}
+</pre>
+
+<p>Functions like <code>slice_assign</code> and <code>chop</code> modify the list; the first is equivalent
+to Python<code>l[i1:i2] = seq</code> and the second to <code>del l[i1:i2]</code>.</p>
+
+<p>List objects are ultimately just Lua 'list-like' tables, but they have extra
+operations defined on them, such as equality and concatention.  For regular
+tables, equality is only true if the two tables are <em>identical objects</em>, whereas
+two lists are equal if they have the same contents, i.e. that <code>l1[i]==l2[i]</code> for
+all elements.</p>
+
+
+<pre>
+&gt; l1 = List {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+&gt; l2 = List {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+&gt; = l1 == l2
+<span class="keyword">true</span>
+&gt; = l1..l2
+{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+</pre>
+
+<p>The <a href="../classes/pl.List.html#">List</a> constructor can be passed a function. If so, it's assumed that this is
+an iterator function that can be repeatedly called to generate a sequence.  One
+such function is <a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.lines">io.lines</a>; the following short, intense little script counts
+the number of lines in standard input:</p>
+
+
+<pre>
+<span class="comment">-- linecount.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+ls = List(<span class="global">io</span>.lines())
+<span class="global">print</span>(#ls)
+</pre>
+
+<p><a href="../classes/pl.List.html#List.iterate">List.iterate</a> captures what <a href="../classes/pl.List.html#">List</a> considers a sequence. In particular, it can
+also iterate over all 'characters' in a string:</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> ch <span class="keyword">in</span> List.iterate <span class="string">'help'</span> <span class="keyword">do</span> <span class="global">io</span>.write(ch,<span class="string">' '</span>) <span class="keyword">end</span>
+h e l p &gt;
+</pre>
+
+<p>Since the function <code>iterate</code> is used internally by the <a href="../classes/pl.List.html#">List</a> constructor,
+strings can be made into lists of character strings very easily.</p>
+
+<p>There are a number of operations that go beyond the standard Python methods. For
+instance, you can <em>partition</em> a list into a table of sublists using a function.
+In the simplest form, you use a predicate (a function returning a boolean value)
+to partition the list into two lists, one of elements matching and another of
+elements not matching. But you can use any function; if we use <a href="https://www.lua.org/manual/5.1/manual.html#pdf-type">type</a> then the
+keys will be the standard Lua type names.</p>
+
+
+<pre>
+&gt; ls = List{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>}
+&gt; ops = <span class="global">require</span> <span class="string">'pl.operator'</span>
+&gt; ls:partition(<span class="keyword">function</span>(x) <span class="keyword">return</span> x &gt; <span class="number">2</span> <span class="keyword">end</span>)
+{<span class="keyword">false</span>={<span class="number">1</span>,<span class="number">2</span>},<span class="keyword">true</span>={<span class="number">3</span>,<span class="number">4</span>}}
+&gt; ls = List{<span class="string">'one'</span>,<span class="global">math</span>.sin,List{<span class="number">1</span>},<span class="number">10</span>,<span class="number">20</span>,List{<span class="number">1</span>,<span class="number">2</span>}}
+&gt; ls:partition(<span class="global">type</span>)
+{<span class="keyword">function</span>={<span class="keyword">function</span>: <span class="number">00369110</span>},<span class="global">string</span>={one},number={<span class="number">10</span>,<span class="number">20</span>},<span class="global">table</span>={{<span class="number">1</span>},{<span class="number">1</span>,<span class="number">2</span>}}}
+</pre>
+
+<p>This is one <a href="../classes/pl.List.html#">List</a> method which returns a table which is not a <a href="../classes/pl.List.html#">List</a>. Bear in
+mind that you can always call a <a href="../classes/pl.List.html#">List</a> method on a plain table argument, so
+<code>List.partition(t,type)</code> works as expected. But these functions will only operate
+on the array part of the table.</p>
+
+<p>The 'nominal' type of the returned table is <code>pl.Multimap</code>, which describes a mapping
+between keys and multiple values. This does not mean that <code>pl.Multimap</code> is automatically
+loaded whenever you use <code>partition</code> (or <a href="../classes/pl.List.html#">List</a> for that matter); this is one of the
+standard metatables which are only filled out when the appropriate module is loaded.
+This allows tables to be tagged appropriately without causing excessive coupling.</p>
+
+<p>Stacks occur everywhere in computing. <a href="../classes/pl.List.html#">List</a> supports stack-like operations;
+there is already <code>pop</code> (remove and return last value) and <code>append</code> acts like
+<code>push</code> (add a value to the end). <code>push</code> is provided as an alias for <code>append</code>, and
+the other stack operation (size) is simply the size operator <code>#</code>.  Queues can
+also be implemented; you use <code>pop</code> to take values out of the queue, and <code>put</code> to
+insert a value at the begining.</p>
+
+<p>You may derive classes from <a href="../classes/pl.List.html#">List</a>, and since the list-returning methods
+are covariant, the result of <code>slice</code> etc will return lists of the derived type,
+not <a href="../classes/pl.List.html#">List</a>. For instance, consider the specialization of a <a href="../classes/pl.List.html#">List</a> type that contains
+numbers in <code>tests/test-list.lua</code>:</p>
+
+
+<pre>
+n1 = NA{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+n2 = NA{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+ns = n1 + <span class="number">2</span>*n2
+asserteq(ns,{<span class="number">12</span>,<span class="number">24</span>,<span class="number">36</span>})
+min,max = ns:slice(<span class="number">1</span>,<span class="number">2</span>):minmax()
+asserteq(T(min,max),T(<span class="number">12</span>,<span class="number">24</span>))
+asserteq(n1:normalize():sum(),<span class="number">1</span>,<span class="number">1e-8</span>)
+</pre>
+
+<p><a name="Map_and_Set_classes"></a></p>
+<h3>Map and Set classes</h3>
+
+<p>The <a href="../classes/pl.Map.html#">Map</a> class exposes what Python would call a 'dict' interface, and accesses
+the hash part of the table. The name 'Map' is used to emphasize the interface,
+not the implementation; it is an object which maps keys onto values; <code>m[&apos;alice&apos;]</code>
+or the equivalent <code>m.alice</code> is the access operation.  This class also provides
+explicit <code>set</code> and <code>get</code> methods, which are trivial for regular maps but get
+interesting when <a href="../classes/pl.Map.html#">Map</a> is subclassed. The other operation is <code>update</code>, which
+extends a map by copying the keys and values from another table, perhaps
+overwriting existing keys:</p>
+
+
+<pre>
+&gt; Map = <span class="global">require</span> <span class="string">'pl.Map'</span>
+&gt; m = Map{one=<span class="number">1</span>,two=<span class="number">2</span>}
+&gt; m:update {three=<span class="number">3</span>,four=<span class="number">4</span>,two=<span class="number">20</span>}
+&gt; = m == M{one=<span class="number">1</span>,two=<span class="number">20</span>,three=<span class="number">3</span>,four=<span class="number">4</span>}
+<span class="keyword">true</span>
+</pre>
+
+<p>The method <code>values</code> returns a list of the values, and <code>keys</code> returns a list of
+the keys; there is no guarantee of order. <code>getvalues</code> is given a list of keys and
+returns a list of values associated with these keys:</p>
+
+
+<pre>
+&gt; m = Map{one=<span class="number">1</span>,two=<span class="number">2</span>,three=<span class="number">3</span>}
+&gt; = m:getvalues {<span class="string">'one'</span>,<span class="string">'three'</span>}
+{<span class="number">1</span>,<span class="number">3</span>}
+&gt; = m:getvalues(m:keys()) == m:values()
+<span class="keyword">true</span>
+</pre>
+
+<p>When querying the value of a <a href="../classes/pl.Map.html#">Map</a>, it is best to use the <code>get</code> method:</p>
+
+
+<pre>
+&gt; <span class="global">print</span>(m:get <span class="string">'one'</span>, m:get <span class="string">'two'</span>)
+<span class="number">1</span>     <span class="number">2</span>
+</pre>
+
+<p>The reason is that <code>m[key]</code> can be ambiguous; due to the current implementation,
+<code>m[&quot;get&quot;]</code> will always succeed, because if a value is not present in the map, it
+will be looked up in the <a href="../classes/pl.Map.html#">Map</a> metatable, which contains a method <code>get</code>. There is
+currently no simple solution to this annoying restriction.</p>
+
+<p>There are some useful classes which inherit from <a href="../classes/pl.Map.html#">Map</a>. An <a href="../classes/pl.OrderedMap.html#">OrderedMap</a> behaves
+like a <a href="../classes/pl.Map.html#">Map</a> but keeps its keys in order if you use its <code>set</code> method to add keys
+and values.  Like all the 'container' classes in Penlight, it defines an <code>iter</code>
+method for iterating over its values; this will return the keys and values in the
+order of insertion; the <code>keys</code> and <code>values</code> methods likewise.</p>
+
+<p>A <a href="../classes/pl.MultiMap.html#">MultiMap</a> allows multiple values to be associated with a given key. So <code>set</code>
+(as before) takes a key and a value, but calling it with the same key and a
+different value does not overwrite but adds a new value. <code>get</code> (or using <code>[]</code>)
+will return a list of values.</p>
+
+<p>A <a href="../classes/pl.Set.html#">Set</a> can be seen as a special kind of <a href="../classes/pl.Map.html#">Map</a>, where all the values are <code>true</code>,
+the keys are the values, and the order is not important. So in this case
+<a href="../classes/pl.Set.html#pl.Set:values">Set.values</a> is defined to return a list of the keys.  Sets can display
+themselves, and the basic operations like <code>union</code> (<code>+</code>) and <code>intersection</code> (<code>*</code>)
+are defined.</p>
+
+
+<pre>
+&gt; Set = <span class="global">require</span> <span class="string">'pl.Set'</span>
+&gt; = Set{<span class="string">'one'</span>,<span class="string">'two'</span>} == Set{<span class="string">'two'</span>,<span class="string">'one'</span>}
+<span class="keyword">true</span>
+&gt; fruit = Set{<span class="string">'apple'</span>,<span class="string">'banana'</span>,<span class="string">'orange'</span>}
+&gt; = fruit[<span class="string">'banana'</span>]
+<span class="keyword">true</span>
+&gt; = fruit[<span class="string">'hazelnut'</span>]
+<span class="keyword">nil</span>
+&gt; = fruit:values()
+{apple,orange,banana}
+&gt; colours = Set{<span class="string">'red'</span>,<span class="string">'orange'</span>,<span class="string">'green'</span>,<span class="string">'blue'</span>}
+&gt; = fruit,colours
+[apple,orange,banana]   [blue,green,orange,red]
+&gt; = fruit+colours
+[blue,green,apple,red,orange,banana]
+&gt; = fruit*colours
+[orange]
+</pre>
+
+<p>There are also the functions <a href="../classes/pl.Set.html#pl.Set:difference">Set.difference</a> and <code>Set.symmetric_difference</code>. The
+first answers the question 'what fruits are not colours?' and the second 'what
+are fruits and colours but not both?'</p>
+
+
+<pre>
+&gt; = fruit - colours
+[apple,banana]
+&gt; = fruit ^ colours
+[blue,green,apple,red,banana]
+</pre>
+
+<p>Adding elements to a set is simply <code>fruit[&apos;peach&apos;] = true</code> and removing is
+<code>fruit[&apos;apple&apos;] = nil</code> . To make this simplicity work properly, the <a href="../classes/pl.Set.html#">Set</a> class has no
+methods - either you use the operator forms or explicitly use <code>Set.intersect</code>
+etc. In this way we avoid the ambiguity that plagues <a href="../classes/pl.Map.html#">Map</a>.</p>
+
+
+<p>(See <a href="../classes/pl.Map.html#">pl.Map</a> and <a href="../classes/pl.Set.html#">pl.Set</a>)</p>
+
+<p><a name="Useful_Operations_on_Tables"></a></p>
+<h3>Useful Operations on Tables</h3>
+
+
+<p>Some notes on terminology: Lua tables are usually <em>list-like</em> (like an array) or
+<em>map-like</em> (like an associative array or dict); they can of course have a
+list-like and a map-like part. Some of the table operations only make sense for
+list-like tables, and some only for map-like tables. (The usual Lua terminology
+is the array part and the hash part of the table, which reflects the actual
+implementation used; it is more accurate to say that a Lua table is an
+associative map which happens to be particularly efficient at acting like an
+array.)</p>
+
+<p>The functions provided in <a href="https://www.lua.org/manual/5.1/manual.html#5.5">table</a> provide all the basic manipulations on Lua
+tables, but as we saw with the <a href="../classes/pl.List.html#">List</a> class, it is useful to build higher-level
+operations on top of those functions. For instance, to copy a table involves this
+kind of loop:</p>
+
+
+<pre>
+<span class="keyword">local</span> res = {}
+<span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(T) <span class="keyword">do</span>
+    res[k] = v
+<span class="keyword">end</span>
+<span class="keyword">return</span> res
+</pre>
+
+<p>The <a href="../libraries/pl.tablex.html#">tablex</a> module provides this as <a href="../libraries/pl.tablex.html#copy">copy</a>, which does a <em>shallow</em> copy of a
+table. There is also <a href="../libraries/pl.tablex.html#deepcopy">deepcopy</a> which goes further than a simple loop in two
+ways; first, it also gives the copy the same metatable as the original (so it can
+copy objects like <a href="../classes/pl.List.html#">List</a> above) and any nested tables will also be copied, to
+arbitrary depth. There is also <a href="../libraries/pl.tablex.html#icopy">icopy</a> which operates on list-like tables, where
+you can set optionally set the start index of the source and destination as well.
+It ensures that any left-over elements will be deleted:</p>
+
+
+<pre>
+asserteq(icopy({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>}),{<span class="number">20</span>,<span class="number">30</span>})   <span class="comment">-- start at 1
+</span>asserteq(icopy({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>},<span class="number">2</span>),{<span class="number">1</span>,<span class="number">20</span>,<span class="number">30</span>}) <span class="comment">-- start at 2
+</span>asserteq(icopy({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>},<span class="number">2</span>,<span class="number">2</span>),{<span class="number">1</span>,<span class="number">30</span>}) <span class="comment">-- start at 2, copy from 2</span>
+</pre>
+
+<p>(This code from the <a href="../libraries/pl.tablex.html#">tablex</a> test module shows the use of <a href="../libraries/pl.test.html#asserteq">pl.test.asserteq</a>)</p>
+
+<p>Whereas, <a href="../libraries/pl.tablex.html#move">move</a> overwrites but does not delete the rest of the destination:</p>
+
+
+<pre>
+asserteq(move({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>}),{<span class="number">20</span>,<span class="number">30</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>})
+asserteq(move({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>},<span class="number">2</span>),{<span class="number">1</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>})
+asserteq(move({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">20</span>,<span class="number">30</span>},<span class="number">2</span>,<span class="number">2</span>),{<span class="number">1</span>,<span class="number">30</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>})
+</pre>
+
+<p>(The difference is somewhat like that between C's <code>strcpy</code> and <code>memmove</code>.)</p>
+
+<p>To summarize, use <a href="../libraries/pl.tablex.html#copy">copy</a> or <a href="../libraries/pl.tablex.html#deepcopy">deepcopy</a> to make a copy of an arbitrary table. To
+copy into a map-like table, use <a href="../libraries/pl.tablex.html#update">update</a>; to copy into a list-like table use
+<a href="../libraries/pl.tablex.html#icopy">icopy</a>, and <a href="../libraries/pl.tablex.html#move">move</a> if you are updating a range in the destination.</p>
+
+<p>To complete this set of operations, there is <a href="../libraries/pl.tablex.html#insertvalues">insertvalues</a> which works like
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.insert">table.insert</a> except that one provides a table of values to be inserted, and
+<a href="../libraries/pl.tablex.html#removevalues">removevalues</a> which removes a range of values.</p>
+
+
+<pre>
+asserteq(insertvalues({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>},<span class="number">2</span>,{<span class="number">20</span>,<span class="number">30</span>}),{<span class="number">1</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+asserteq(insertvalues({<span class="number">1</span>,<span class="number">2</span>},{<span class="number">3</span>,<span class="number">4</span>}),{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+</pre>
+
+<p>Another example:</p>
+
+
+<pre>
+&gt; T = <span class="global">require</span> <span class="string">'pl.tablex'</span>
+&gt; t = {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+&gt; = T.removevalues(t,<span class="number">2</span>,<span class="number">3</span>)
+{<span class="number">10</span>,<span class="number">40</span>}
+&gt; = T.insertvalues(t,<span class="number">2</span>,{<span class="number">20</span>,<span class="number">30</span>})
+{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>}
+</pre>
+
+<p>In a similar spirit to <a href="../libraries/pl.tablex.html#deepcopy">deepcopy</a>, <a href="../libraries/pl.tablex.html#deepcompare">deepcompare</a> will take two tables and return
+true only if they have exactly the same values and structure.</p>
+
+
+<pre>
+&gt; t1 = {<span class="number">1</span>,{<span class="number">2</span>,<span class="number">3</span>},<span class="number">4</span>}
+&gt; t2 = deepcopy(t1)
+&gt; = t1 == t2
+<span class="keyword">false</span>
+&gt; = deepcompare(t1,t2)
+<span class="keyword">true</span>
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#find">find</a> will return the index of a given value in a list-like table. Note that
+like <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.find">string.find</a> you can specify an index to start searching, so that all
+instances can be found. There is an optional fourth argument, which makes the
+search start at the end and go backwards, so we could define <a href="../libraries/pl.tablex.html#rfind">rfind</a> like so:</p>
+
+
+<pre>
+<span class="keyword">function</span> rfind(t,val,istart)
+    <span class="keyword">return</span> tablex.find(t,val,istart,<span class="keyword">true</span>)
+<span class="keyword">end</span>
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#find">find</a> does a linear search, so it can slow down code that depends on it.  If
+efficiency is required for large tables, consider using an <em>index map</em>.
+<a href="../libraries/pl.tablex.html#index_map">index_map</a> will return a table where the keys are the original values of the
+list, and the associated values are the indices. (It is almost exactly the
+representation needed for a <em>set</em>.)</p>
+
+
+<pre>
+&gt; t = {<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>}
+&gt; = tablex.find(t,<span class="string">'two'</span>)
+<span class="number">2</span>
+&gt; = tablex.find(t,<span class="string">'four'</span>)
+<span class="keyword">nil</span>
+&gt; il = tablex.index_map(t)
+&gt; = il[<span class="string">'two'</span>]
+<span class="number">2</span>
+&gt; = il.two
+<span class="number">2</span>
+</pre>
+
+<p>A version of <a href="../libraries/pl.tablex.html#index_map">index_map</a> called <a href="../libraries/pl.tablex.html#makeset">makeset</a> is also provided, where the values are
+just <code>true</code>. This is useful because two such sets can be compared for equality
+using <a href="../libraries/pl.tablex.html#deepcompare">deepcompare</a>:</p>
+
+
+<pre>
+&gt; = deepcompare(makeset {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},makeset {<span class="number">2</span>,<span class="number">1</span>,<span class="number">3</span>})
+<span class="keyword">true</span>
+</pre>
+
+<p>Consider the problem of determining the new employees that have joined in a
+period. Assume we have two files of employee names:</p>
+
+
+<pre>
+(last-month.txt)
+smith,john
+brady,maureen
+mongale,thabo
+
+(this-month.txt)
+smith,john
+smit,johan
+brady,maureen
+mogale,thabo
+van der Merwe,Piet
+</pre>
+
+<p>To find out differences, just make the employee lists into sets, like so:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+
+<span class="keyword">function</span> read_employees(file)
+  <span class="keyword">local</span> ls = List(<span class="global">io</span>.lines(file)) <span class="comment">-- a list of employees
+</span>  <span class="keyword">return</span> tablex.makeset(ls)
+<span class="keyword">end</span>
+
+last = read_employees <span class="string">'last-month.txt'</span>
+this = read_employees <span class="string">'this-month.txt'</span>
+
+<span class="comment">-- who is in this but not in last?
+</span>diff = tablex.difference(this,last)
+
+<span class="comment">-- in a set, the keys are the values...
+</span><span class="keyword">for</span> e <span class="keyword">in</span> <span class="global">pairs</span>(diff) <span class="keyword">do</span> <span class="global">print</span>(e) <span class="keyword">end</span>
+
+<span class="comment">--  *output*
+</span><span class="comment">-- van der Merwe,Piet
+</span><span class="comment">-- smit,johan</span>
+</pre>
+
+<p>The <a href="../libraries/pl.tablex.html#difference">difference</a> operation is easy to write and read:</p>
+
+
+<pre>
+<span class="keyword">for</span> e <span class="keyword">in</span> <span class="global">pairs</span>(this) <span class="keyword">do</span>
+  <span class="keyword">if</span> <span class="keyword">not</span> last[e] <span class="keyword">then</span>
+    <span class="global">print</span>(e)
+  <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>Using <a href="../libraries/pl.tablex.html#difference">difference</a> here is not that it is a tricky thing to code, it is that you
+are stating your intentions clearly to other readers of your code. (And naturally
+to your future self, in six months time.)</p>
+
+<p><a href="../libraries/pl.tablex.html#find_if">find_if</a> will search a table using a function. The optional third argument is a
+value which will be passed as a second argument to the function. <a href="../libraries/pl.operator.html#">pl.operator</a>
+provides the Lua operators conveniently wrapped as functions, so the basic
+comparison functions are available:</p>
+
+
+<pre>
+&gt; ops = <span class="global">require</span> <span class="string">'pl.operator'</span>
+&gt; = tablex.find_if({<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>},ops.gt,<span class="number">20</span>)
+<span class="number">3</span>       <span class="keyword">true</span>
+</pre>
+
+<p>Note that <a href="../libraries/pl.tablex.html#find_if">find_if</a> will also return the <em>actual value</em> returned by the function,
+which of course is usually just  <code>true</code> for a boolean function, but any value
+which is not <code>nil</code> and not <code>false</code> can be usefully passed back.</p>
+
+<p><a href="../libraries/pl.tablex.html#deepcompare">deepcompare</a> does a thorough recursive comparison, but otherwise using the
+default equality operator. <a href="../libraries/pl.tablex.html#compare">compare</a> allows you to specify exactly what function
+to use when comparing two list-like tables, and <a href="../libraries/pl.tablex.html#compare_no_order">compare_no_order</a> is true if
+they contain exactly the same elements. Do note that the latter does not need an
+explicit comparison function - in this case the implementation is actually to
+compare the two sets, as above:</p>
+
+
+<pre>
+&gt; = compare_no_order({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">2</span>,<span class="number">1</span>,<span class="number">3</span>})
+<span class="keyword">true</span>
+&gt; = compare_no_order({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">2</span>,<span class="number">1</span>,<span class="number">3</span>},<span class="string">'=='</span>)
+<span class="keyword">true</span>
+</pre>
+
+<p>(Note the special string '==' above; instead of saying <code>ops.gt</code> or <code>ops.eq</code> we
+can use the strings '>' or '==' respectively.)</p>
+
+<p><a href="../libraries/pl.tablex.html#sort">sort</a> and <a href="../libraries/pl.tablex.html#sortv">sortv</a> return iterators that will iterate through the
+sorted elements of a table. <a href="../libraries/pl.tablex.html#sort">sort</a> iterates by sorted key order, and
+<a href="../libraries/pl.tablex.html#sortv">sortv</a> iterates by sorted value order. For example, given a table
+with names and ages, it is trivial to iterate over the elements:</p>
+
+
+<pre>
+&gt; t = {john=<span class="number">27</span>,jane=<span class="number">31</span>,mary=<span class="number">24</span>}
+&gt; <span class="keyword">for</span> name,age <span class="keyword">in</span> tablex.sort(t) <span class="keyword">do</span> <span class="global">print</span>(name,age) <span class="keyword">end</span>
+jane    <span class="number">31</span>
+john    <span class="number">27</span>
+mary    <span class="number">24</span>
+&gt; <span class="keyword">for</span> name,age <span class="keyword">in</span> tablex.sortv(t) <span class="keyword">do</span> <span class="global">print</span>(name,age) <span class="keyword">end</span>
+mary    <span class="number">24</span>
+john    <span class="number">27</span>
+jane    <span class="number">31</span>
+</pre>
+
+<p>There are several ways to merge tables in PL. If they are list-like, then see the
+operations defined by <a href="../classes/pl.List.html#">pl.List</a>, like concatenation. If they are map-like, then
+<a href="../libraries/pl.tablex.html#merge">merge</a> provides two basic operations. If the third arg is false, then the result
+only contains the keys that are in common between the two tables, and if true,
+then the result contains all the keys of both tables. These are in fact
+generalized set union and intersection operations:</p>
+
+
+<pre>
+&gt; S1 = {john=<span class="number">27</span>,jane=<span class="number">31</span>,mary=<span class="number">24</span>}
+&gt; S2 = {jane=<span class="number">31</span>,jones=<span class="number">50</span>}
+&gt; = tablex.merge(S1, S2, <span class="keyword">false</span>)
+{jane=<span class="number">31</span>}
+&gt; = tablex.merge(S1, S2, <span class="keyword">true</span>)
+{mary=<span class="number">24</span>,jane=<span class="number">31</span>,john=<span class="number">27</span>,jones=<span class="number">50</span>}
+</pre>
+
+<p>When working with tables, you will often find yourself writing loops like in the
+first example. Loops are second nature to programmers, but they are often not the
+most elegant and self-describing way of expressing an operation. Consider the
+<a href="../libraries/pl.tablex.html#map">map</a> function, which creates a new table by applying a function to each element
+of the original:</p>
+
+
+<pre>
+&gt; = map(<span class="global">math</span>.sin, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{  <span class="number">0.84</span>,  <span class="number">0.91</span>,  <span class="number">0.14</span>, -<span class="number">0.76</span>}
+&gt; = map(<span class="keyword">function</span>(x) <span class="keyword">return</span> x*x <span class="keyword">end</span>, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{<span class="number">1</span>,<span class="number">4</span>,<span class="number">9</span>,<span class="number">16</span>}
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#map">map</a> saves you from writing a loop, and the resulting code is often clearer, as
+well as being shorter. This is not to say that 'loops are bad' (although you will
+hear that from some extremists), just that it's good to capture standard
+patterns. Then the loops you do write will stand out and acquire more significance.</p>
+
+<p><a href="../libraries/pl.tablex.html#pairmap">pairmap</a> is interesting, because the function works with both the key and the
+value.</p>
+
+
+<pre>
+&gt; t = {fred=<span class="number">10</span>,bonzo=<span class="number">20</span>,alice=<span class="number">4</span>}
+&gt; = pairmap(<span class="keyword">function</span>(k,v) <span class="keyword">return</span> v <span class="keyword">end</span>, t)
+{<span class="number">4</span>,<span class="number">10</span>,<span class="number">20</span>}
+&gt; = pairmap(<span class="keyword">function</span>(k,v) <span class="keyword">return</span> k <span class="keyword">end</span>, t)
+{<span class="string">'alice'</span>,<span class="string">'fred'</span>,<span class="string">'bonzo'</span>}
+</pre>
+
+<p>(These are common enough operations that the first is defined as <a href="../libraries/pl.tablex.html#values">values</a> and the
+second as <a href="../libraries/pl.tablex.html#keys">keys</a>.) If the function returns two values, then the <em>second</em> value is
+considered to be the new key:</p>
+
+
+<pre>
+&gt; = pairmap(t,<span class="keyword">function</span>(k,v) <span class="keyword">return</span> v+<span class="number">10</span>, k:upper() <span class="keyword">end</span>)
+{BONZO=<span class="number">30</span>,FRED=<span class="number">20</span>,ALICE=<span class="number">14</span>}
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#map2">map2</a> applies a function to two tables:</p>
+
+
+<pre>
+&gt; map2(ops.add,{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">10</span>,<span class="number">20</span>})
+{<span class="number">11</span>,<span class="number">22</span>}
+&gt; map2(<span class="string">'*'</span>,{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">10</span>,<span class="number">20</span>})
+{<span class="number">10</span>,<span class="number">40</span>}
+</pre>
+
+<p>The various map operations generate tables; <a href="../libraries/pl.tablex.html#reduce">reduce</a> applies a function of two
+arguments over a table and returns the result as a scalar:</p>
+
+
+<pre>
+&gt; reduce (<span class="string">'+'</span>, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>})
+<span class="number">6</span>
+&gt; reduce (<span class="string">'..'</span>, {<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>})
+<span class="string">'onetwothree'</span>
+</pre>
+
+<p>Finally, <a href="../libraries/pl.tablex.html#zip">zip</a> sews different tables together:</p>
+
+
+<pre>
+&gt; = zip({<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>})
+{{<span class="number">1</span>,<span class="number">10</span>},{<span class="number">2</span>,<span class="number">20</span>},{<span class="number">3</span>,<span class="number">30</span>}}
+</pre>
+
+<p>Browsing through the documentation, you will find that <a href="../libraries/pl.tablex.html#">tablex</a> and <a href="../classes/pl.List.html#">List</a> share
+methods.  For instance, <a href="../libraries/pl.tablex.html#imap">tablex.imap</a> and <a href="../classes/pl.List.html#List:map">List.map</a> are basically the same
+function; they both operate over the array-part of the table and generate another
+table. This can also be expressed as a <em>list comprehension</em> <code>C &apos;f(x) for x&apos; (t)</code>
+which makes the operation more explicit. So why are there different ways to do
+the same thing? The main reason is that not all tables are Lists: the expression
+<code>ls:map(&apos;#&apos;)</code> will return a <em>list</em> of the lengths of any elements of <code>ls</code>. A list
+is a thin wrapper around a table, provided by the metatable <a href="../classes/pl.List.html#">List</a>. Sometimes you
+may wish to work with ordinary Lua tables; the <a href="../classes/pl.List.html#">List</a> interface is not a
+compulsory way to use Penlight table operations.</p>
+
+<p><a name="Operations_on_two_dimensional_tables"></a></p>
+<h3>Operations on two-dimensional tables</h3>
+
+
+<p>Two-dimensional tables are of course easy to represent in Lua, for instance
+<code>{{1,2},{3,4}}</code> where we store rows as subtables and index like so <code>A[col][row]</code>.
+This is the common representation used by matrix libraries like
+<a href="http://lua-users.org/wiki/LuaMatrix">LuaMatrix</a>. <a href="../libraries/pl.array2d.html#">pl.array2d</a> does not provide
+matrix operations, since that is the job for a specialized library, but rather
+provides generalizations of the higher-level operations provided by <a href="../libraries/pl.tablex.html#">pl.tablex</a>
+for one-dimensional arrays.</p>
+
+<p><a href="../libraries/pl.array2d.html#iter">iter</a> is a useful generalization of <a href="https://www.lua.org/manual/5.1/manual.html#pdf-ipairs">ipairs</a>. (The extra parameter determines
+whether you want the indices as well.)</p>
+
+
+<pre>
+&gt; a = {{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">3</span>,<span class="number">4</span>}}
+&gt; <span class="keyword">for</span> i,j,v <span class="keyword">in</span> array2d.iter(a,<span class="keyword">true</span>) <span class="keyword">do</span> <span class="global">print</span>(i,j,v) <span class="keyword">end</span>
+<span class="number">1</span>       <span class="number">1</span>       <span class="number">1</span>
+<span class="number">1</span>       <span class="number">2</span>       <span class="number">2</span>
+<span class="number">2</span>       <span class="number">1</span>       <span class="number">3</span>
+<span class="number">2</span>       <span class="number">2</span>       <span class="number">4</span>
+</pre>
+
+<p>Note that you can always convert an arbitrary 2D array into a 'list of lists'
+with <code>List(tablex.map(List,a))</code></p>
+
+<p><a href="../libraries/pl.array2d.html#map">map</a> will apply a function over all elements (notice that extra arguments can be
+provided, so this operation is in effect <code>function(x) return x-1 end</code>)</p>
+
+
+<pre>
+&gt; array2d.map(<span class="string">'-'</span>,a,<span class="number">1</span>)
+{{<span class="number">0</span>,<span class="number">1</span>},{<span class="number">2</span>,<span class="number">3</span>}}
+</pre>
+
+<p>2D arrays are stored as an array of rows, but columns can be extracted:</p>
+
+
+<pre>
+&gt; array2d.column(a,<span class="number">1</span>)
+{<span class="number">1</span>,<span class="number">3</span>}
+</pre>
+
+<p>There are three equivalents to <a href="../libraries/pl.tablex.html#reduce">tablex.reduce</a>. You can either reduce along the
+rows (which is the most efficient) or reduce along the columns. Either one will
+give you a 1D array. And <a href="../libraries/pl.array2d.html#reduce2">reduce2</a> will apply two operations: the first one
+reduces the rows, and the second reduces the result.</p>
+
+
+<pre>
+&gt; array2d.reduce_rows(<span class="string">'+'</span>,a)
+{<span class="number">3</span>,<span class="number">7</span>}
+&gt; array2d.reduce_cols(<span class="string">'+'</span>,a)
+{<span class="number">4</span>,<span class="number">6</span>}
+&gt; <span class="comment">-- same as tablex.reduce('*',array.reduce_rows('+',a))
+</span>&gt; array2d.reduce2(<span class="string">'*'</span>,<span class="string">'+'</span>,a)
+<span class="number">21</span>    `
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#map2">tablex.map2</a> applies an operation to two tables, giving another table.
+<a href="../libraries/pl.array2d.html#map2">array2d.map2</a> does this for 2D arrays. Note that you have to provide the <em>rank</em>
+of the arrays involved, since it's hard to always correctly deduce this from the
+data:</p>
+
+
+<pre>
+&gt; b = {{<span class="number">10</span>,<span class="number">20</span>},{<span class="number">30</span>,<span class="number">40</span>}}
+&gt; a = {{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">3</span>,<span class="number">4</span>}}
+&gt; = array2d.map2(<span class="string">'+'</span>,<span class="number">2</span>,<span class="number">2</span>,a,b)  <span class="comment">-- two 2D arrays
+</span>{{<span class="number">11</span>,<span class="number">22</span>},{<span class="number">33</span>,<span class="number">44</span>}}
+&gt; = array2d.map2(<span class="string">'+'</span>,<span class="number">1</span>,<span class="number">2</span>,{<span class="number">10</span>,<span class="number">100</span>},a)  <span class="comment">-- 1D, 2D
+</span>{{<span class="number">11</span>,<span class="number">102</span>},{<span class="number">13</span>,<span class="number">104</span>}}
+&gt; = array2d.map2(<span class="string">'*'</span>,<span class="number">2</span>,<span class="number">1</span>,a,{<span class="number">1</span>,-<span class="number">1</span>})  <span class="comment">-- 2D, 1D
+</span>{{<span class="number">1</span>,-<span class="number">2</span>},{<span class="number">3</span>,-<span class="number">4</span>}}
+</pre>
+
+<p>Of course, you are not limited to simple arithmetic. Say we have a 2D array of
+strings, and wish to print it out with proper right justification. The first step
+is to create all the string lengths by mapping <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.len">string.len</a> over the array, the
+second is to reduce this along the columns using <a href="https://www.lua.org/manual/5.1/manual.html#pdf-math.max">math.max</a> to get maximum column
+widths, and last, apply <a href="../libraries/pl.stringx.html#rjust">stringx.rjust</a> with these widths.</p>
+
+
+<pre>
+maxlens = reduce_cols(<span class="global">math</span>.max,map(<span class="string">'#'</span>,lines))
+lines = map2(stringx.rjust,<span class="number">2</span>,<span class="number">1</span>,lines,maxlens)
+</pre>
+
+<p>There is <a href="../libraries/pl.array2d.html#product">product</a> which returns  the <em>Cartesian product</em> of two 1D arrays. The
+result is a 2D array formed from applying the function to all possible pairs from
+the two arrays.</p>
+
+
+<pre>
+&gt; array2d.product(<span class="string">'{}'</span>,{<span class="number">1</span>,<span class="number">2</span>},{<span class="string">'a'</span>,<span class="string">'b'</span>})
+{{{<span class="number">1</span>,<span class="string">'b'</span>},{<span class="number">2</span>,<span class="string">'a'</span>}},{{<span class="number">1</span>,<span class="string">'a'</span>},{<span class="number">2</span>,<span class="string">'b'</span>}}}
+</pre>
+
+<p>There is a set of operations which work in-place on 2D arrays. You can
+<a href="../libraries/pl.array2d.html#swap_rows">swap_rows</a> and <a href="../libraries/pl.array2d.html#swap_cols">swap_cols</a>; the first really is a simple one-liner, but the idea
+here is to give the operation a name. <a href="../libraries/pl.array2d.html#remove_row">remove_row</a> and <a href="../libraries/pl.array2d.html#remove_col">remove_col</a> are
+generalizations of <a href="https://www.lua.org/manual/5.1/manual.html#pdf-table.remove">table.remove</a>. Likewise, <a href="../libraries/pl.array2d.html#extract_rows">extract_rows</a> and <a href="../libraries/pl.array2d.html#extract_cols">extract_cols</a>
+are given arrays of indices and discard anything else. So, for instance,
+<code>extract_cols(A,{2,4})</code> will leave just columns 2 and 4 in the array.</p>
+
+<p><a href="../classes/pl.List.html#List:slice">List.slice</a> is often useful on 1D arrays; <a href="../libraries/pl.array2d.html#slice">slice</a> does the same thing, but is
+generally given a start (row,column) and a end (row,column).</p>
+
+
+<pre>
+&gt; A = {{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>},{<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">7</span>,<span class="number">8</span>,<span class="number">9</span>}}
+&gt; B = slice(A,<span class="number">1</span>,<span class="number">1</span>,<span class="number">2</span>,<span class="number">2</span>)
+&gt; write(B)
+ <span class="number">1</span> <span class="number">2</span>
+ <span class="number">4</span> <span class="number">5</span>
+&gt; B = slice(A,<span class="number">2</span>,<span class="number">2</span>)
+&gt; write(B,<span class="keyword">nil</span>,<span class="string">'%4.1f'</span>)
+ <span class="number">5.0</span> <span class="number">6.0</span>
+ <span class="number">8.0</span> <span class="number">9.0</span>
+</pre>
+
+<p>Here <a href="../libraries/pl.array2d.html#write">write</a> is used to print out an array nicely; the second parameter is <code>nil</code>,
+which is the default (stdout) but can be any file object and the third parameter
+is an optional format (as used in <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.format">string.format</a>).</p>
+
+<p><a href="../libraries/pl.array2d.html#parse_range">parse_range</a> will take a spreadsheet range like 'A1:B2' or 'R1C1:R2C2' and
+return the range as four numbers, which can be passed to <a href="../libraries/pl.array2d.html#slice">slice</a>. The rule is
+that <a href="../libraries/pl.array2d.html#slice">slice</a> will return an array of the appropriate shape depending on the
+range; if a range represents a row or a column, the result is 1D, otherwise 2D.</p>
+
+<p>This applies to <a href="../libraries/pl.array2d.html#iter">iter</a> as well, which can also optionally be given a range:</p>
+
+
+
+<pre>
+&gt; <span class="keyword">for</span> i,j,v <span class="keyword">in</span> iter(A,<span class="keyword">true</span>,<span class="number">2</span>,<span class="number">2</span>) <span class="keyword">do</span> <span class="global">print</span>(i,j,v) <span class="keyword">end</span>
+<span class="number">2</span>       <span class="number">2</span>       <span class="number">5</span>
+<span class="number">2</span>       <span class="number">3</span>       <span class="number">6</span>
+<span class="number">3</span>       <span class="number">2</span>       <span class="number">8</span>
+<span class="number">3</span>       <span class="number">3</span>       <span class="number">9</span>
+</pre>
+
+<p><a href="../libraries/pl.array2d.html#new">new</a> will construct a new 2D array with the given dimensions. You provide an
+initial value for the elements, which is interpreted as a function if it's
+callable. With <code>L</code> being <a href="../libraries/pl.utils.html#string_lambda">utils.string_lambda</a> we then have the following way to
+make an <em>identity matrix</em>:</p>
+
+
+<pre>
+asserteq(
+    array.new(<span class="number">3</span>,<span class="number">3</span>,L<span class="string">'|i,j| i==j and 1 or 0'</span>),
+    {{<span class="number">1</span>,<span class="number">0</span>,<span class="number">0</span>},{<span class="number">0</span>,<span class="number">1</span>,<span class="number">0</span>},{<span class="number">0</span>,<span class="number">0</span>,<span class="number">1</span>}}
+)
+</pre>
+
+<p>Please note that most functions in <a href="../libraries/pl.array2d.html#">array2d</a> are <em>covariant</em>, that is, they
+return an array of the same type as they receive.  In particular, any objects
+created with <a href="../libraries/pl.data.html#new">data.new</a> or <code>matrix.new</code> will remain data or matrix objects when
+reshaped or sliced, etc.  Data objects have the <a href="../libraries/pl.array2d.html#">array2d</a> functions available as
+methods.</p>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/03-strings.md.html b/Data/Libraries/Penlight/docs/manual/03-strings.md.html
new file mode 100644
index 0000000..a629192
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/03-strings.md.html
@@ -0,0 +1,397 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Extra_String_Methods">Extra String Methods </a></li>
+<li><a href="#String_Templates">String Templates </a></li>
+<li><a href="#Another_Style_of_Template">Another Style of Template </a></li>
+<li><a href="#File_style_I_O_on_Strings">File-style I/O on Strings </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><strong>Strings. Higher-level operations on strings.</strong></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Strings. Higher-level operations on strings.</h2>
+
+<p><a name="Extra_String_Methods"></a></p>
+<h3>Extra String Methods</h3>
+
+
+<p>These are convenient borrowings from Python, as described in 3.6.1 of the Python
+reference, but note that indices in Lua always begin at one. <a href="../libraries/pl.stringx.html#">stringx</a> defines
+functions like <a href="../libraries/pl.stringx.html#isalpha">isalpha</a> and <a href="../libraries/pl.stringx.html#isdigit">isdigit</a>, which return <code>true</code> if s is only composed
+of letters or digits respectively. <a href="../libraries/pl.stringx.html#startswith">startswith</a> and <a href="../libraries/pl.stringx.html#endswith">endswith</a> are convenient
+ways to find substrings. (<a href="../libraries/pl.stringx.html#endswith">endswith</a> works as in Python 2.5, so that `f:endswith
+{'.bat','.exe','.cmd'}` will be true for any filename which ends with these
+extensions.) There are justify methods and whitespace trimming functions like
+<a href="../libraries/pl.stringx.html#strip">strip</a>.</p>
+
+
+<pre>
+&gt; stringx.import()
+&gt; (<span class="string">'bonzo.dog'</span>):endswith {<span class="string">'.dog'</span>,<span class="string">'.cat'</span>}
+<span class="keyword">true</span>
+&gt; (<span class="string">'bonzo.txt'</span>):endswith {<span class="string">'.dog'</span>,<span class="string">'.cat'</span>}
+<span class="keyword">false</span>
+&gt; (<span class="string">'bonzo.cat'</span>):endswith {<span class="string">'.dog'</span>,<span class="string">'.cat'</span>}
+<span class="keyword">true</span>
+&gt; (<span class="string">' stuff'</span>):ljust(<span class="number">20</span>,<span class="string">'+'</span>)
+<span class="string">'++++++++++++++ stuff'</span>
+&gt; (<span class="string">'  stuff '</span>):lstrip()
+<span class="string">'stuff '</span>
+&gt; (<span class="string">'  stuff '</span>):rstrip()
+<span class="string">'  stuff'</span>
+&gt; (<span class="string">'  stuff '</span>):strip()
+<span class="string">'stuff'</span>
+&gt; <span class="keyword">for</span> s <span class="keyword">in</span> (<span class="string">'one\ntwo\nthree\n'</span>):lines() <span class="keyword">do</span> <span class="global">print</span>(s) <span class="keyword">end</span>
+one
+two
+three
+</pre>
+
+<p>Most of these can be fairly easily implemented using the Lua string library,
+which is more general and powerful. But they are convenient operations to have
+easily at hand. Note that can be injected into the <a href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a> table if you use
+<code>stringx.import</code>, but a simple alias like <code>local stringx = require &apos;pl.stringx&apos;</code>
+is preferrable. This is the recommended practice when writing modules for
+consumption by other people, since it is bad manners to change the global state
+of the rest of the system. Magic may be used for convenience, but there is always
+a price.</p>
+
+
+<p><a name="String_Templates"></a></p>
+<h3>String Templates</h3>
+
+
+<p>Another borrowing from Python, string templates allow you to substitute values
+looked up in a table:</p>
+
+
+<pre>
+<span class="keyword">local</span> Template = <span class="global">require</span> (<span class="string">'pl.text'</span>).Template
+t = Template(<span class="string">'${here} is the $answer'</span>)
+<span class="global">print</span>(t:substitute {here = <span class="string">'Lua'</span>, answer = <span class="string">'best'</span>})
+==&gt;
+Lua is the best
+</pre>
+
+<p>'$ variables' can optionally have curly braces; this form is useful if you are
+glueing text together to make variables, e.g <code>${prefix}_name_${postfix}</code>. The
+<a href="../libraries/pl.text.html#Template:substitute">substitute</a> method will throw an error if a $ variable is not found in the
+table, and the <a href="../libraries/pl.text.html#Template:safe_substitute">safe_substitute</a> method will not.</p>
+
+<p>The Lua implementation has an extra method, <a href="../libraries/pl.text.html#Template:indent_substitute">indent_substitute</a> which is very
+useful for inserting blocks of text, because it adjusts indentation. Consider
+this example:</p>
+
+
+<pre>
+<span class="comment">-- testtemplate.lua
+</span><span class="keyword">local</span> Template = <span class="global">require</span> (<span class="string">'pl.text'</span>).Template
+
+t = Template <span class="string">[[
+    for i = 1,#$t do
+        $body
+    end
+]]</span>
+
+body = Template <span class="string">[[
+local row = $t[i]
+for j = 1,#row do
+    fun(row[j])
+end
+]]</span>
+
+<span class="global">print</span>(t:indent_substitute {body=body,t=<span class="string">'tbl'</span>})
+</pre>
+
+<p>And the output is:</p>
+
+
+<pre>
+<span class="keyword">for</span> i = <span class="number">1</span>,#tbl <span class="keyword">do</span>
+    <span class="keyword">local</span> row = tbl[i]
+    <span class="keyword">for</span> j = <span class="number">1</span>,#row <span class="keyword">do</span>
+        fun(row[j])
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p><a href="../libraries/pl.text.html#Template:indent_substitute">indent_substitute</a> can substitute templates, and in which case they themselves
+will be substituted using the given table. So in this case, <code>$t</code> was substituted
+twice.</p>
+
+<p><a href="../libraries/pl.text.html#">pl.text</a> also has a number of useful functions like <a href="../libraries/pl.text.html#dedent">dedent</a>, which strips all
+the initial indentation from a multiline string. As in Python, this is useful for
+preprocessing multiline strings if you like indenting them with your code. The
+function <a href="../libraries/pl.text.html#wrap">wrap</a> is passed a long string (a <em>paragraph</em>) and returns a list of
+lines that fit into a desired line width. As an extension, there is also <a href="../libraries/pl.text.html#indent">indent</a>
+for indenting multiline strings.</p>
+
+<p>New in Penlight with the 0.9 series is <code>text.format_operator</code>. Calling this
+enables Python-style string formating using the modulo operator <code>%</code>:</p>
+
+
+<pre>
+&gt; text.format_operator()
+&gt; = <span class="string">'%s[%d]'</span> % {<span class="string">'dog'</span>,<span class="number">1</span>}
+dog[<span class="number">1</span>]
+</pre>
+
+<p>So in its simplest form it saves the typing involved with <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.format">string.format</a>; it
+will also expand <code>$</code> variables using named fields:</p>
+
+
+<pre>
+&gt; = <span class="string">'$animal[$num]'</span> % {animal=<span class="string">'dog'</span>,num=<span class="number">1</span>}
+dog[<span class="number">1</span>]
+</pre>
+
+<p>As with <code>stringx.import</code> you have to do this explicitly, since all strings share the same
+metatable. But in your own scripts you can feel free to do this.</p>
+
+<p><a name="Another_Style_of_Template"></a></p>
+<h3>Another Style of Template</h3>
+
+<p>A new module is <a href="../libraries/pl.template.html#">template</a>, which is a version of Rici Lake's <a href="http://lua-users.org/wiki/SlightlyLessSimpleLuaPreprocessor">Lua
+Preprocessor</a>.  This
+allows you to mix Lua code with your templates in a straightforward way. There
+are only two rules:</p>
+
+<ul>
+    <li>Lines begining with <code>#</code> are Lua</li>
+    <li>Otherwise, anything inside <code>$()</code> is a Lua expression.</li>
+</ul>
+
+<p>So a template generating an HTML list would look like this:</p>
+
+
+<pre>
+&lt;ul&gt;
+# <span class="keyword">for</span> i,val <span class="keyword">in</span> <span class="global">ipairs</span>(T) <span class="keyword">do</span>
+&lt;li&gt;$(i) = $(val:upper())&lt;/li&gt;
+# <span class="keyword">end</span>
+&lt;/ul&gt;
+</pre>
+
+<p>Assume the text is inside <code>tmpl</code>, then the template can be expanded using:</p>
+
+
+<pre>
+<span class="keyword">local</span> template = <span class="global">require</span> <span class="string">'pl.template'</span>
+<span class="keyword">local</span> my_env = {
+  <span class="global">ipairs</span> = <span class="global">ipairs</span>,
+  T = {<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'three'</span>}
+}
+res = template.substitute(tmpl, my_env)
+</pre>
+
+<p>and we get</p>
+
+
+<pre>
+&lt;ul&gt;
+&lt;li&gt;<span class="number">1</span> = ONE&lt;/li&gt;
+&lt;li&gt;<span class="number">2</span> = TWO&lt;/li&gt;
+&lt;li&gt;<span class="number">3</span> = THREE&lt;/li&gt;
+&lt;/ul&gt;
+</pre>
+
+<p>There is a single function, <a href="../libraries/pl.template.html#substitute">template.substitute</a> which is passed a template
+string and an environment table.   This table may contain some special fields,
+like <code>\_parent</code> which can be set to a table representing a 'fallback' environment
+in case a symbol was not found. <code>\_brackets</code> is usually '()' and <code>\_escape</code> is
+usually '#' but it's sometimes necessary to redefine these if the defaults
+interfere with the target language - for instance, <code>$(V)</code> has another meaning in
+Make, and <code>#</code> means a preprocessor line in C/C++.</p>
+
+<p>Finally, if something goes wrong, passing <code>_debug</code> will cause the intermediate
+Lua code to be dumped if there's a problem.</p>
+
+<p>Here is a C code generation example; something that could easily be extended to
+be a minimal Lua extension skeleton generator.</p>
+
+
+<pre>
+<span class="keyword">local</span> subst = <span class="global">require</span> <span class="string">'pl.template'</span>.substitute
+
+<span class="keyword">local</span> templ = <span class="string">[[
+#include &lt;lua.h&gt;
+#include &lt;lauxlib.h&gt;
+#include &lt;lualib.h&gt;
+
+&gt; for _,f in ipairs(mod) do
+static int l_$(f.name) (lua_State *L) {
+
+}
+&gt; end
+
+static const luaL_reg $(mod.name)[] = {
+&gt; for _,f in ipairs(mod) do
+    {"$(f.name)",l_$(f.name)},
+&gt; end
+    {NULL,NULL}
+};
+
+int luaopen_$(mod.name) {
+   luaL_register (L, "$(mod.name)", $(mod.name));
+    return 1;
+}
+]]</span>
+
+<span class="global">print</span>(subst(templ,{
+    _escape = <span class="string">'&gt;'</span>,
+    <span class="global">ipairs</span> = <span class="global">ipairs</span>,
+    mod = {
+        name = <span class="string">'baggins'</span>;
+        {name=<span class="string">'frodo'</span>},
+        {name=<span class="string">'bilbo'</span>}
+    }
+}))
+</pre>
+
+<p><a name="File_style_I_O_on_Strings"></a></p>
+<h3>File-style I/O on Strings</h3>
+
+<p><a href="../libraries/pl.stringio.html#">pl.stringio</a>  provides just three functions; <a href="../libraries/pl.stringio.html#open">stringio.open</a> is passed a string,
+and returns a file-like object for reading. It supports a <code>read</code> method, which
+takes the same arguments as standard file objects:</p>
+
+
+<pre>
+&gt; f = stringio.open <span class="string">'first line\n10 20 30\n'</span>
+&gt; = f:read()
+first line
+&gt; = f:read(<span class="string">'*n'</span>,<span class="string">'*n'</span>,<span class="string">'*n'</span>)
+<span class="number">10</span>    <span class="number">20</span>    <span class="number">30</span>
+</pre>
+
+<p><code>lines</code> and <code>seek</code> are also supported.</p>
+
+<p><code>stringio.lines</code> is a useful short-cut for iterating over all the lines in a
+string.</p>
+
+<p><a href="../libraries/pl.stringio.html#create">stringio.create</a> creates a writeable file-like object. You then use <code>write</code> to
+this stream, and finally extract the builded string using <code>value</code>.  This 'string
+builder' pattern is useful for efficiently creating large strings.</p>
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/04-paths.md.html b/Data/Libraries/Penlight/docs/manual/04-paths.md.html
new file mode 100644
index 0000000..070a3ea
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/04-paths.md.html
@@ -0,0 +1,329 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Working_with_Paths">Working with Paths </a></li>
+<li><a href="#File_Operations">File Operations </a></li>
+<li><a href="#Directory_Operations">Directory Operations </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><strong>Paths and Directories</strong></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Paths and Directories</h2>
+
+<p><a name="Working_with_Paths"></a></p>
+<h3>Working with Paths</h3>
+
+<p>Programs should not depend on quirks of your operating system. They will be
+harder to read, and need to be ported for other systems.  The worst of course is
+hardcoding paths like 'c:\' in programs, and wondering why Vista complains so
+much. But even something like <code>dir..&apos;\&apos;..file</code> is a problem, since Unix can't
+understand backslashes in this way. <code>dir..&apos;/&apos;..file</code> is <em>usually</em> portable, but
+it's best to put this all into a simple function, <a href="../libraries/pl.path.html#join">path.join</a>. If you
+consistently use <a href="../libraries/pl.path.html#join">path.join</a>, then it's much easier to write cross-platform code,
+since it handles the directory separator for you.</p>
+
+<p><a href="../libraries/pl.path.html#">pl.path</a> provides the same functionality as Python's <code>os.path</code> module (11.1).</p>
+
+
+<pre>
+&gt; p = <span class="string">'c:\\bonzo\\DOG.txt'</span>
+&gt; = path.normcase (p)  <span class="comment">---&gt; only makes sense on Windows
+</span>c:\bonzo\dog.txt
+&gt; = path.splitext (p)
+c:\bonzo\DOG    .txt
+&gt; = path.extension (p)
+.txt
+&gt; = path.basename (p)
+DOG.txt
+&gt; = path.exists(p)
+<span class="keyword">false</span>
+&gt; = path.join (<span class="string">'fred'</span>,<span class="string">'alice.txt'</span>)
+fred\alice.txt
+&gt; = path.exists <span class="string">'pretty.lua'</span>
+<span class="keyword">true</span>
+&gt; = path.getsize <span class="string">'pretty.lua'</span>
+<span class="number">2125</span>
+&gt; = path.isfile <span class="string">'pretty.lua'</span>
+<span class="keyword">true</span>
+&gt; = path.isdir <span class="string">'pretty.lua'</span>
+<span class="keyword">false</span>
+</pre>
+
+<p>It is very important for all programmers, not just on Unix, to only write to
+where they are allowed to write. <a href="../libraries/pl.path.html#expanduser">path.expanduser</a> will expand '~' (tilde) into
+the home directory. Depending on your OS, this will be a guaranteed place where
+you can create files:</p>
+
+
+<pre>
+&gt; = path.expanduser <span class="string">'~/mydata.txt'</span>
+<span class="string">'C:\Documents and Settings\SJDonova/mydata.txt'</span>
+
+&gt; = path.expanduser <span class="string">'~/mydata.txt'</span>
+/home/sdonovan/mydata.txt
+</pre>
+
+<p>Under Windows, <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.tmpname">os.tmpname</a> returns a path which leads to your drive root full of
+temporary files. (And increasingly, you do not have access to this root folder.)
+This is corrected by <a href="../libraries/pl.path.html#tmpname">path.tmpname</a>, which uses the environment variable TMP:</p>
+
+
+<pre>
+&gt; <span class="global">os</span>.tmpname()  <span class="comment">-- not a good place to put temporary files!
+</span><span class="string">'\s25g.'</span>
+&gt; path.tmpname()
+<span class="string">'C:\DOCUME~1\SJDonova\LOCALS~1\Temp\s25g.1'</span>
+</pre>
+
+<p>A useful extra function is <a href="../libraries/pl.path.html#package_path">pl.path.package_path</a>, which will tell you the path
+of a particular Lua module.  So on my system, <code>package_path(&apos;pl.path&apos;)</code> returns
+'C:\Program Files\Lua\5.1\lualibs\pl\path.lua', and <code>package_path(&apos;ifs&apos;)</code> returns
+'C:\Program Files\Lua\5.1\clibs\lfs.dll'. It is implemented in terms of
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-package.searchpath">package.searchpath</a>, which is a new function in Lua 5.2 which has been
+implemented for Lua 5.1 in Penlight.</p>
+
+<p><a name="File_Operations"></a></p>
+<h3>File Operations</h3>
+
+<p><a href="../libraries/pl.file.html#">pl.file</a> is a new module that provides more sensible names for common file
+operations. For instance, <a href="https://www.lua.org/manual/5.1/manual.html#pdf-file:read">file.read</a> and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-file:write">file.write</a> are aliases for
+<a href="../libraries/pl.utils.html#readfile">utils.readfile</a> and <a href="../libraries/pl.utils.html#writefile">utils.writefile</a>.</p>
+
+<p>Smaller files can be efficiently read and written in one operation. <a href="https://www.lua.org/manual/5.1/manual.html#pdf-file:read">file.read</a>
+is passed a filename and returns the contents as a string, if successful; if not,
+then it returns <code>nil</code> and the actual error message. There is an optional boolean
+parameter if you want the file to be read in binary mode (this makes no
+difference on Unix but remains important with Windows.)</p>
+
+<p>In previous versions of Penlight, <a href="../libraries/pl.utils.html#readfile">utils.readfile</a> would read standard input if
+the file was not specified, but this can lead to nasty bugs; use <code>io.read &apos;*a&apos;</code>
+to grab all of standard input.</p>
+
+<p>Similarly, <a href="https://www.lua.org/manual/5.1/manual.html#pdf-file:write">file.write</a> takes a filename and a string which will be written to
+that file.</p>
+
+<p>For example, this little script converts a file into upper case:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+<span class="global">assert</span>(#arg == <span class="number">2</span>, <span class="string">'supply two filenames'</span>)
+text = <span class="global">assert</span>(file.read(arg[<span class="number">1</span>]))
+<span class="global">assert</span>(file.write(arg[<span class="number">2</span>],text:upper()))
+</pre>
+
+<p>Copying files is suprisingly tricky. <a href="../libraries/pl.file.html#copy">file.copy</a> and <a href="../libraries/pl.file.html#move">file.move</a> attempt to use
+the best implementation possible. On Windows, they link to the API functions
+<code>CopyFile</code> and <code>MoveFile</code>, but only if the <code>alien</code> package is installed (this is
+true for Lua for Windows.) Otherwise, the system copy command is used. This can
+be ugly when writing Windows GUI applications, because of the dreaded flashing
+black-box problem with launching processes.</p>
+
+<p><a name="Directory_Operations"></a></p>
+<h3>Directory Operations</h3>
+
+<p><a href="../libraries/pl.dir.html#">pl.dir</a> provides some useful functions for working with directories. <code>fnmatch</code>
+will match a filename against a shell pattern, and <code>filter</code> will return any files
+in the supplied list which match the given pattern, which correspond to the
+functions in the Python <code>fnmatch</code> module. <code>getdirectories</code> will return all
+directories contained in a directory, and <code>getfiles</code> will return all files in a
+directory which match a shell pattern. These functions return the files as a
+table, unlike <a href="http://stevedonovan.github.io/lua-stdlibs/modules/lfs.html#dir">lfs.dir</a> which returns an iterator.)</p>
+
+<p><a href="../libraries/pl.dir.html#makepath">dir.makepath</a> can create a full path, creating subdirectories as necessary;
+<code>rmtree</code> is the Nuclear Option of file deleting functions, since it will
+recursively clear out and delete all directories found begining at a path (there
+is a similar function with this name in the Python <code>shutils</code> module.)</p>
+
+
+<pre>
+&gt; = dir.makepath <span class="string">'t\\temp\\bonzo'</span>
+&gt; = path.isdir <span class="string">'t\\temp\\bonzo'</span>
+<span class="keyword">true</span>
+&gt; = dir.rmtree <span class="string">'t'</span>
+</pre>
+
+<p><a href="../libraries/pl.dir.html#rmtree">dir.rmtree</a> depends on <a href="../libraries/pl.dir.html#walk">dir.walk</a>, which is a powerful tool for scanning a whole
+directory tree. Here is the implementation of <a href="../libraries/pl.dir.html#rmtree">dir.rmtree</a>:</p>
+
+
+<pre>
+<span class="comment">--- remove a whole directory tree.
+</span><span class="comment">-- @param path A directory path
+</span><span class="keyword">function</span> dir.rmtree(fullpath)
+    <span class="keyword">for</span> root,dirs,files <span class="keyword">in</span> dir.walk(fullpath) <span class="keyword">do</span>
+        <span class="keyword">for</span> i,f <span class="keyword">in</span> <span class="global">ipairs</span>(files) <span class="keyword">do</span>
+            <span class="global">os</span>.remove(path.join(root,f))
+        <span class="keyword">end</span>
+        lfs.rmdir(root)
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p><a href="../libraries/pl.dir.html#clonetree">dir.clonetree</a> clones directory trees. The first argument is a path that must
+exist, and the second path is the path to be cloned. (Note that this path cannot
+be <em>inside</em> the first path, since this leads to madness.)  By default, it will
+then just recreate the directory structure. You can in addition provide a
+function, which will be applied for all files found.</p>
+
+
+<pre>
+<span class="comment">-- make a copy of my libs folder
+</span><span class="global">require</span> <span class="string">'pl'</span>
+p1 = <span class="string">[[d:\dev\lua\libs]]</span>
+p2 = <span class="string">[[D:\dev\lua\libs\..\tests]]</span>
+dir.clonetree(p1,p2,dir.copyfile)
+</pre>
+
+<p>A more sophisticated version, which only copies files which have been modified:</p>
+
+
+<pre>
+<span class="comment">-- p1 and p2 as before, or from arg[1] and arg[2]
+</span>dir.clonetree(p1,p2,<span class="keyword">function</span>(f1,f2)
+  <span class="keyword">local</span> res
+  <span class="keyword">local</span> t1,t2 = path.getmtime(f1),path.getmtime(f2)
+  <span class="comment">-- f2 might not exist, so be careful about t2
+</span>  <span class="keyword">if</span> <span class="keyword">not</span> t2 <span class="keyword">or</span> t1 &gt; t2 <span class="keyword">then</span>
+    res = dir.copyfile(f1,f2)
+  <span class="keyword">end</span>
+  <span class="keyword">return</span> res <span class="comment">-- indicates successful operation
+</span><span class="keyword">end</span>)
+</pre>
+
+<p><a href="../libraries/pl.dir.html#clonetree">dir.clonetree</a> uses <a href="../libraries/pl.path.html#common_prefix">path.common_prefix</a>. With <code>p1</code> and <code>p2</code> defined above, the
+common path is 'd:\dev\lua'. So 'd:\dev\lua\libs\testfunc.lua' is copied to
+'d:\dev\lua\test\testfunc.lua', etc.</p>
+
+<p>If you need to find the common path of list of files, then <a href="../libraries/pl.tablex.html#reduce">tablex.reduce</a> will
+do the job:</p>
+
+
+<pre>
+&gt; p3 = <span class="string">[[d:\dev]]</span>
+&gt; = tablex.reduce(path.common_prefix,{p1,p2,p3})
+<span class="string">'d:\dev'</span>
+</pre>
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/05-dates.md.html b/Data/Libraries/Penlight/docs/manual/05-dates.md.html
new file mode 100644
index 0000000..c04b036
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/05-dates.md.html
@@ -0,0 +1,269 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Creating_and_Displaying_Dates">Creating and Displaying Dates </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><strong>Date and Time</strong></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Date and Time</h2>
+
+<p><a id="date"></a></p>
+
+<p>NOTE: the Date module is deprecated</p>
+
+<p><a name="Creating_and_Displaying_Dates"></a></p>
+<h3>Creating and Displaying Dates</h3>
+
+<p>The <a href="../classes/pl.Date.html#">Date</a> class provides a simplified way to work with <a href="http://www.lua.org/pil/22.1.html">date and
+time</a> in Lua; it leans heavily on the functions
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.date">os.date</a> and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.time">os.time</a>.</p>
+
+<p>A <a href="../classes/pl.Date.html#">Date</a> object can be constructed from a table, just like with <a href="https://www.lua.org/manual/5.1/manual.html#pdf-os.time">os.time</a>.
+Methods are provided to get and set the various parts of the date.</p>
+
+
+<pre>
+&gt; d = Date {year = <span class="number">2011</span>, month = <span class="number">3</span>, day = <span class="number">2</span> }
+&gt; = d
+<span class="number">2011</span>-<span class="number">03</span>-<span class="number">02</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = d:month(),d:year(),d:day()
+<span class="number">3</span>    <span class="number">2011</span>    <span class="number">2</span>
+&gt; d:month(<span class="number">4</span>)
+&gt; = d
+<span class="number">2011</span>-<span class="number">04</span>-<span class="number">02</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; d:add {day=<span class="number">1</span>}
+&gt; = d
+<span class="number">2011</span>-<span class="number">04</span>-<span class="number">03</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+</pre>
+
+<p><code>add</code> takes a table containing one of the date table fields.</p>
+
+
+<pre>
+&gt; = d:weekday_name()
+Sun
+&gt; = d:last_day()
+<span class="number">2011</span>-<span class="number">04</span>-<span class="number">30</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = d:month_name(<span class="keyword">true</span>)
+April
+</pre>
+
+<p>There is a default conversion to text for date objects, but <a href="../classes/pl.Date.html#Date.Format">Date.Format</a> gives
+you full control of the format for both parsing and displaying dates:</p>
+
+
+<pre>
+&gt; iso = Date.Format <span class="string">'yyyy-mm-dd'</span>
+&gt; d = iso:parse <span class="string">'2010-04-10'</span>
+&gt; amer = Date.Format <span class="string">'mm/dd/yyyy'</span>
+&gt; = amer:<span class="global">tostring</span>(d)
+<span class="number">04</span>/<span class="number">10</span>/<span class="number">2010</span>
+</pre>
+
+<p>With the 0.9.7 relase, the <a href="../classes/pl.Date.html#">Date</a> constructor has become more flexible. You may
+omit any of the 'year', 'month' or 'day' fields:</p>
+
+
+<pre>
+&gt; = Date { year = <span class="number">2008</span> }
+<span class="number">2008</span>-<span class="number">01</span>-<span class="number">01</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = Date { month = <span class="number">3</span> }
+<span class="number">2011</span>-<span class="number">03</span>-<span class="number">01</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = Date { day = <span class="number">20</span> }
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">20</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = Date { hour = <span class="number">14</span>, min = <span class="number">30</span> }
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">13</span> <span class="number">14</span>:<span class="number">30</span>:<span class="number">00</span>
+</pre>
+
+<p>If 'year' is omitted, then the current year is assumed, and likewise for 'month'.</p>
+
+<p>To set the time on such a partial date, you can use the fact that the 'setter'
+methods return the date object and so you can 'chain' these methods.</p>
+
+
+<pre>
+&gt; d = Date { day = <span class="number">03</span> }
+&gt; = d:hour(<span class="number">18</span>):min(<span class="number">30</span>)
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">03</span> <span class="number">18</span>:<span class="number">30</span>:<span class="number">00</span>
+</pre>
+
+<p>Finally, <a href="../classes/pl.Date.html#">Date</a> also now accepts positional arguments:</p>
+
+
+<pre>
+&gt; = Date(<span class="number">2011</span>,<span class="number">10</span>,<span class="number">3</span>)
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">03</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = Date(<span class="number">2011</span>,<span class="number">10</span>,<span class="number">3</span>,<span class="number">18</span>,<span class="number">30</span>,<span class="number">23</span>)
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">03</span> <span class="number">18</span>:<span class="number">30</span>:<span class="number">23</span>
+</pre>
+
+<p><code>Date.format</code> has been extended. If you construct an instance without a pattern,
+then it will try to match against a set of known formats. This is useful for
+human-input dates since keeping to a strict format is not one of the strong
+points of users. It assumes that there will be a date, and then a date.</p>
+
+
+<pre>
+&gt; df = Date.Format()
+&gt; = df:parse <span class="string">'5.30pm'</span>
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">13</span> <span class="number">17</span>:<span class="number">30</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'1730'</span>
+<span class="keyword">nil</span>     day out of range: <span class="number">1730</span> is <span class="keyword">not</span> between <span class="number">1</span> <span class="keyword">and</span> <span class="number">31</span>
+&gt; = df:parse <span class="string">'17.30'</span>
+<span class="number">2011</span>-<span class="number">10</span>-<span class="number">13</span> <span class="number">17</span>:<span class="number">30</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'mar'</span>
+<span class="number">2011</span>-<span class="number">03</span>-<span class="number">01</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'3 March'</span>
+<span class="number">2011</span>-<span class="number">03</span>-<span class="number">03</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'15 March'</span>
+<span class="number">2011</span>-<span class="number">03</span>-<span class="number">15</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'15 March 2008'</span>
+<span class="number">2008</span>-<span class="number">03</span>-<span class="number">15</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'15 March 2008 1.30pm'</span>
+<span class="number">2008</span>-<span class="number">03</span>-<span class="number">15</span> <span class="number">13</span>:<span class="number">30</span>:<span class="number">00</span>
+&gt; = df:parse <span class="string">'2008-10-03 15:30:23'</span>
+<span class="number">2008</span>-<span class="number">10</span>-<span class="number">03</span> <span class="number">15</span>:<span class="number">30</span>:<span class="number">23</span>
+</pre>
+
+<p>ISO date format is of course a good idea if you need to deal with users from
+different countries. Here is the default behaviour for 'short' dates:</p>
+
+
+<pre>
+&gt; = df:parse <span class="string">'24/02/12'</span>
+<span class="number">2012</span>-<span class="number">02</span>-<span class="number">24</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+</pre>
+
+<p>That's not what Americans expect! It's tricky to work out in a cross-platform way
+exactly what the expected format is, so there is an explicit flag:</p>
+
+
+<pre>
+&gt; df:US_order(<span class="keyword">true</span>)
+&gt; = df:parse <span class="string">'9/11/01'</span>
+<span class="number">2001</span>-<span class="number">11</span>-<span class="number">09</span> <span class="number">12</span>:<span class="number">00</span>:<span class="number">00</span>
+</pre>
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/06-data.md.html b/Data/Libraries/Penlight/docs/manual/06-data.md.html
new file mode 100644
index 0000000..585e23e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/06-data.md.html
@@ -0,0 +1,1633 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Reading_Data_Files">Reading Data Files </a></li>
+<li><a href="#Reading_Unstructured_Text_Data">Reading Unstructured Text Data </a></li>
+<li><a href="#Reading_Columnar_Data">Reading Columnar Data </a></li>
+<li><a href="#Reading_Configuration_Files">Reading Configuration Files </a></li>
+<li><a href="#Lexical_Scanning">Lexical Scanning </a></li>
+<li><a href="#XML">XML </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><strong>Data</strong></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Data</h2>
+
+<p><a name="Reading_Data_Files"></a></p>
+<h3>Reading Data Files</h3>
+
+<p>The first thing to consider is this: do you actually need to write a custom file
+reader? And if the answer is yes, the next question is: can you write the reader
+in as clear a way as possible? Correctness, Robustness, and Speed; pick the first
+two and the third can be sorted out later, <em>if necessary</em>.</p>
+
+<p>A common sort of data file is the configuration file format commonly used on Unix
+systems. This format is often called a <em>property</em> file in the Java world.</p>
+
+
+<pre>
+# Read timeout <span class="keyword">in</span> seconds
+read.timeout=<span class="number">10</span>
+
+# Write timeout <span class="keyword">in</span> seconds
+write.timeout=<span class="number">10</span>
+</pre>
+
+<p>Here is a simple Lua implementation:</p>
+
+
+<pre>
+<span class="comment">-- property file parsing with Lua string patterns
+</span>props = []
+<span class="keyword">for</span> line <span class="keyword">in</span> <span class="global">io</span>.lines() <span class="keyword">do</span>
+    <span class="keyword">if</span> line:find(<span class="string">'#'</span>,<span class="number">1</span>,<span class="keyword">true</span>) ~= <span class="number">1</span> <span class="keyword">and</span> <span class="keyword">not</span> line:find(<span class="string">'^%s*$'</span>) <span class="keyword">then</span>
+        <span class="keyword">local</span> var,value = line:match(<span class="string">'([^=]+)=(.*)'</span>)
+        props[var] = value
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>Very compact, but it suffers from a similar disease in equivalent Perl programs;
+it uses odd string patterns which are 'lexically noisy'. Noisy code like this
+slows the casual reader down. (For an even more direct way of doing this, see the
+next section, 'Reading Configuration Files')</p>
+
+<p>Another implementation, using the Penlight libraries:</p>
+
+
+<pre>
+<span class="comment">-- property file parsing with extended string functions
+</span><span class="global">require</span> <span class="string">'pl'</span>
+stringx.import()
+props = []
+<span class="keyword">for</span> line <span class="keyword">in</span> <span class="global">io</span>.lines() <span class="keyword">do</span>
+    <span class="keyword">if</span> <span class="keyword">not</span> line:startswith(<span class="string">'#'</span>) <span class="keyword">and</span> <span class="keyword">not</span> line:isspace() <span class="keyword">then</span>
+        <span class="keyword">local</span> var,value = line:splitv(<span class="string">'='</span>)
+        props[var] = value
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>This is more self-documenting; it is generally better to make the code express
+the <em>intention</em>, rather than having to scatter comments everywhere - comments are
+necessary, of course, but mostly to give the higher view of your intention that
+cannot be expressed in code. It is slightly slower, true, but in practice the
+speed of this script is determined by I/O, so further optimization is unnecessary.</p>
+
+<p><a name="Reading_Unstructured_Text_Data"></a></p>
+<h3>Reading Unstructured Text Data</h3>
+
+<p>Text data is sometimes unstructured, for example a file containing words. The
+<a href="../libraries/pl.input.html#">pl.input</a> module has a number of functions which makes processing such files
+easier. For example, a script to count the number of words in standard input
+using <code>import.words</code>:</p>
+
+
+<pre>
+<span class="comment">-- countwords.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> k = <span class="number">1</span>
+<span class="keyword">for</span> w <span class="keyword">in</span> input.words(<span class="global">io</span>.stdin) <span class="keyword">do</span>
+    k = k + <span class="number">1</span>
+<span class="keyword">end</span>
+<span class="global">print</span>(<span class="string">'count'</span>,k)
+</pre>
+
+<p>Or this script to calculate the average of a set of numbers using <a href="../libraries/pl.input.html#numbers">input.numbers</a>:</p>
+
+
+<pre>
+<span class="comment">-- average.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> k = <span class="number">1</span>
+<span class="keyword">local</span> sum = <span class="number">0</span>
+<span class="keyword">for</span> n <span class="keyword">in</span> input.numbers(<span class="global">io</span>.stdin) <span class="keyword">do</span>
+    sum = sum + n
+    k = k + <span class="number">1</span>
+<span class="keyword">end</span>
+<span class="global">print</span>(<span class="string">'average'</span>,sum/k)
+</pre>
+
+<p>These scripts can be improved further by <em>eliminating loops</em> In the last case,
+there is a perfectly good function <a href="../libraries/pl.seq.html#sum">seq.sum</a> which can already take a sequence of
+numbers and calculate these numbers for us:</p>
+
+
+<pre>
+<span class="comment">-- average2.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> total,n = seq.sum(input.numbers())
+<span class="global">print</span>(<span class="string">'average'</span>,total/n)
+</pre>
+
+<p>A further simplification here is that if <code>numbers</code> or <code>words</code> are not passed an
+argument, they will grab their input from standard input.  The first script can
+be rewritten:</p>
+
+
+<pre>
+<span class="comment">-- countwords2.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="global">print</span>(<span class="string">'count'</span>,seq.count(input.words()))
+</pre>
+
+<p>A useful feature of a sequence generator like <code>numbers</code> is that it can read from
+a string source. Here is a script to calculate the sums of the numbers on each
+line in a file:</p>
+
+
+<pre>
+<span class="comment">-- sums.lua
+</span><span class="keyword">for</span> line <span class="keyword">in</span> <span class="global">io</span>.lines() <span class="keyword">do</span>
+    <span class="global">print</span>(seq.sum(input.numbers(line))
+<span class="keyword">end</span>
+</pre>
+
+<p><a name="Reading_Columnar_Data"></a></p>
+<h3>Reading Columnar Data</h3>
+
+<p>It is very common to find data in columnar form, either space or comma-separated,
+perhaps with an initial set of column headers. Here is a typical example:</p>
+
+
+<pre>
+EventID    Magnitude    LocationX    LocationY    LocationZ
+<span class="number">981124001</span>    <span class="number">2.0</span>    <span class="number">18988.4</span>    <span class="number">10047.1</span>    <span class="number">4149.7</span>
+<span class="number">981125001</span>    <span class="number">0.8</span>    <span class="number">19104.0</span>    <span class="number">9970.4</span>    <span class="number">5088.7</span>
+<span class="number">981127003</span>    <span class="number">0.5</span>    <span class="number">19012.5</span>    <span class="number">9946.9</span>    <span class="number">3831.2</span>
+...
+</pre>
+
+<p><a href="../libraries/pl.input.html#fields">input.fields</a> is designed to extract several columns, given some delimiter
+(default to whitespace).  Here is a script to calculate the average X location of
+all the events:</p>
+
+
+<pre>
+<span class="comment">-- avg-x.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="global">io</span>.read() <span class="comment">-- skip the header line
+</span><span class="keyword">local</span> sum,count = seq.sum(input.fields {<span class="number">3</span>})
+<span class="global">print</span>(sum/count)
+</pre>
+
+<p><a href="../libraries/pl.input.html#fields">input.fields</a> is passed either a field count, or a list of column indices,
+starting at one as usual. So in this case we're only interested in column 3.  If
+you pass it a field count, then you get every field up to that count:</p>
+
+
+<pre>
+<span class="keyword">for</span> id,mag,locX,locY,locZ <span class="keyword">in</span> input.fields (<span class="number">5</span>) <span class="keyword">do</span>
+....
+<span class="keyword">end</span>
+</pre>
+
+<p><a href="../libraries/pl.input.html#fields">input.fields</a> by default tries to convert each field to a number. It will skip
+lines which clearly don't match the pattern, but will abort the script if there
+are any fields which cannot be converted to numbers.</p>
+
+<p>The second parameter is a delimiter, by default spaces. ' ' is understood to mean
+'any number of spaces', i.e. '%s+'. Any Lua string pattern can be used.</p>
+
+<p>The third parameter is a <em>data source</em>, by default standard input (defined by
+<a href="../libraries/pl.input.html#create_getter">input.create_getter</a>.) It assumes that the data source has a <code>read</code> method which
+brings in the next line, i.e. it is a 'file-like' object. As a special case, a
+string will be split into its lines:</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> x,y <span class="keyword">in</span> input.fields(<span class="number">2</span>,<span class="string">' '</span>,<span class="string">'10 20\n30 40\n'</span>) <span class="keyword">do</span> <span class="global">print</span>(x,y) <span class="keyword">end</span>
+<span class="number">10</span>      <span class="number">20</span>
+<span class="number">30</span>      <span class="number">40</span>
+</pre>
+
+<p>Note the default behaviour for bad fields, which is to show the offending line
+number:</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> x,y <span class="keyword">in</span> input.fields(<span class="number">2</span>,<span class="string">' '</span>,<span class="string">'10 20\n30 40x\n'</span>) <span class="keyword">do</span> <span class="global">print</span>(x,y) <span class="keyword">end</span>
+<span class="number">10</span>      <span class="number">20</span>
+line <span class="number">2</span>: cannot convert <span class="string">'40x'</span> to number
+</pre>
+
+<p>This behaviour of <a href="../libraries/pl.input.html#fields">input.fields</a> is appropriate for a script which you want to
+fail immediately with an appropriate <em>user</em> error message if conversion fails.
+The fourth optional parameter is an options table: <code>{no_fail=true}</code> means that
+conversion is attempted but if it fails it just returns the string, rather as AWK
+would operate. You are then responsible for checking the type of the returned
+field. <code>{no_convert=true}</code> switches off conversion altogether and all fields are
+returned as strings.</p>
+
+
+<p>Sometimes it is useful to bring a whole dataset into memory, for operations such
+as extracting columns. Penlight provides a flexible reader specifically for
+reading this kind of data, using the <a href="../libraries/pl.data.html#">data</a> module. Given a file looking like this:</p>
+
+
+<pre>
+x,y
+<span class="number">10</span>,<span class="number">20</span>
+<span class="number">2</span>,<span class="number">5</span>
+<span class="number">40</span>,<span class="number">50</span>
+</pre>
+
+<p>Then <a href="../libraries/pl.data.html#read">data.read</a> will create a table like this, with each row represented by a
+sublist:</p>
+
+
+<pre>
+&gt; t = data.read <span class="string">'test.txt'</span>
+&gt; pretty.dump(t)
+{{<span class="number">10</span>,<span class="number">20</span>},{<span class="number">2</span>,<span class="number">5</span>},{<span class="number">40</span>,<span class="number">50</span>},fieldnames={<span class="string">'x'</span>,<span class="string">'y'</span>},delim=<span class="string">','</span>}
+</pre>
+
+<p>You can now analyze this returned table using the supplied methods. For instance,
+the method <a href="../libraries/pl.data.html#Data.column_by_name">column_by_name</a> returns a table of all the values of that column.</p>
+
+
+<pre>
+<span class="comment">-- testdata.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+d = data.read(<span class="string">'fev.txt'</span>)
+<span class="keyword">for</span> _,name <span class="keyword">in</span> <span class="global">ipairs</span>(d.fieldnames) <span class="keyword">do</span>
+    <span class="keyword">local</span> col = d:column_by_name(name)
+    <span class="keyword">if</span> <span class="global">type</span>(col[<span class="number">1</span>]) == <span class="string">'number'</span> <span class="keyword">then</span>
+        <span class="keyword">local</span> total,n = seq.sum(col)
+        utils.printf(<span class="string">"Average for %s is %f\n"</span>,name,total/n)
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p><a href="../libraries/pl.data.html#read">data.read</a> tries to be clever when given data; by default it expects a first
+line of column names, unless any of them are numbers. It tries to deduce the
+column delimiter by looking at the first line. Sometimes it guesses wrong; these
+things can be specified explicitly. The second optional parameter is an options
+table: can override <code>delim</code> (a string pattern), <code>fieldnames</code> (a list or
+comma-separated string), specify <code>no_convert</code> (default is to convert), numfields
+(indices of columns known to be numbers, as a list) and <code>thousands_dot</code> (when the
+thousands separator in Excel CSV is '.')</p>
+
+<p>A very powerful feature is a way to execute SQL-like queries on such data:</p>
+
+
+<pre>
+<span class="comment">-- queries on tabular data
+</span><span class="global">require</span> <span class="string">'pl'</span>
+<span class="keyword">local</span> d = data.read(<span class="string">'xyz.txt'</span>)
+<span class="keyword">local</span> q = d:<span class="global">select</span>(<span class="string">'x,y,z where x &gt; 3 and z &lt; 2 sort by y'</span>)
+<span class="keyword">for</span> x,y,z <span class="keyword">in</span> q <span class="keyword">do</span>
+    <span class="global">print</span>(x,y,z)
+<span class="keyword">end</span>
+</pre>
+
+<p>Please note that the format of queries is restricted to the following syntax:</p>
+
+
+<pre>
+FIELDLIST [ <span class="string">'where'</span> CONDITION ] [ <span class="string">'sort by'</span> FIELD [asc|desc]]
+</pre>
+
+<p>Any valid Lua code can appear in <code>CONDITION</code>; remember it is <em>not</em> SQL and you
+have to use <code>==</code> (this warning comes from experience.)</p>
+
+<p>For this to work, <em>field names must be Lua identifiers</em>. So <a href="../libraries/pl.data.html#read">read</a> will massage
+fieldnames so that all non-alphanumeric chars are replaced with underscores.
+However, the <code>original_fieldnames</code> field always contains the original un-massaged
+fieldnames.</p>
+
+<p><a href="../libraries/pl.data.html#read">read</a> can handle standard CSV files fine, although doesn't try to be a
+full-blown CSV parser.  With the <code>csv=true</code> option, it's possible to have
+double-quoted fields, which may contain commas; then trailing commas become
+significant as well.</p>
+
+<p>Spreadsheet programs are not always the best tool to
+process such data, strange as this might seem to some people. This is a toy CSV
+file; to appreciate the problem, imagine thousands of rows and dozens of columns
+like this:</p>
+
+
+<pre>
+Department Name,Employee ID,Project,Hours Booked
+sales,<span class="number">1231</span>,overhead,<span class="number">4</span>
+sales,<span class="number">1255</span>,overhead,<span class="number">3</span>
+engineering,<span class="number">1501</span>,development,<span class="number">5</span>
+engineering,<span class="number">1501</span>,maintenance,<span class="number">3</span>
+engineering,<span class="number">1433</span>,maintenance,<span class="number">10</span>
+</pre>
+
+<p>The task is to reduce the dataset to a relevant set of rows and columns, perhaps
+do some processing on row data, and write the result out to a new CSV file. The
+<a href="../libraries/pl.data.html#Data.write_row">write_row</a> method uses the delimiter to write the row to a file;
+<code>Data.select_row</code> is like <code>Data.select</code>, except it iterates over <em>rows</em>, not
+fields; this is necessary if we are dealing with a lot of columns!</p>
+
+
+<pre>
+names = {[<span class="number">1501</span>]=<span class="string">'don'</span>,[<span class="number">1433</span>]=<span class="string">'dilbert'</span>}
+keepcols = {<span class="string">'Employee_ID'</span>,<span class="string">'Hours_Booked'</span>}
+t:write_row (outf,{<span class="string">'Employee'</span>,<span class="string">'Hours_Booked'</span>})
+q = t:select_row {
+    fields=keepcols,
+    where=<span class="keyword">function</span>(row) <span class="keyword">return</span> row[<span class="number">1</span>]==<span class="string">'engineering'</span> <span class="keyword">end</span>
+}
+<span class="keyword">for</span> row <span class="keyword">in</span> q <span class="keyword">do</span>
+    row[<span class="number">1</span>] = names[row[<span class="number">1</span>]]
+    t:write_row(outf,row)
+<span class="keyword">end</span>
+</pre>
+
+<p><code>Data.select_row</code> and <code>Data.select</code> can be passed a table specifying the query; a
+list of field names, a function defining the condition and an optional parameter
+<code>sort_by</code>. It isn't really necessary here, but if we had a more complicated row
+condition (such as belonging to a specified set) then it is not generally
+possible to express such a condition as a query string, without resorting to
+hackery such as global variables.</p>
+
+<p>With 1.0.3, you can specify explicit conversion functions for selected columns.
+For instance, this is a log file with a Unix date stamp:</p>
+
+
+<pre>
+Time Message
+<span class="number">1266840760</span> +# EE7C0600006F0D00C00F06010302054000000308010A00002B00407B00
+<span class="number">1266840760</span> closure data <span class="number">0.000000</span> <span class="number">1972</span> <span class="number">1972</span> <span class="number">0</span>
+<span class="number">1266840760</span> ++ <span class="number">1266840760</span> EE <span class="number">1</span>
+<span class="number">1266840760</span> +# EE7C0600006F0D00C00F06010302054000000408020A00002B00407B00
+<span class="number">1266840764</span> closure data <span class="number">0.000000</span> <span class="number">1972</span> <span class="number">1972</span> <span class="number">0</span>
+</pre>
+
+<p>We would like the first column as an actual date object, so the <code>convert</code>
+field sets an explicit conversion for column 1. (Note that we have to explicitly
+convert the string to a number first.)</p>
+
+
+<pre>
+Date = <span class="global">require</span> <span class="string">'pl.Date'</span>
+
+<span class="keyword">function</span> date_convert (ds)
+    <span class="keyword">return</span> Date(<span class="global">tonumber</span>(ds))
+<span class="keyword">end</span>
+
+d = data.read(f,{convert={[<span class="number">1</span>]=date_convert},last_field_collect=<span class="keyword">true</span>})
+</pre>
+
+<p>This gives us a two-column dataset, where the first column contains <a href="../classes/pl.Date.html#">Date</a> objects
+and the second column contains the rest of the line. Queries can then easily
+pick out events on a day of the week:</p>
+
+
+<pre>
+q = d:<span class="global">select</span> <span class="string">"Time,Message where Time:weekday_name()=='Sun'"</span>
+</pre>
+
+<p>Data does not have to come from files, nor does it necessarily come from the lab
+or the accounts department. On Linux, <code>ps aux</code> gives you a full listing of all
+processes running on your machine. It is straightforward to feed the output of
+this command into <a href="../libraries/pl.data.html#read">data.read</a> and perform useful queries on it. Notice that
+non-identifier characters like '%' get converted into underscores:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+f = <span class="global">io</span>.popen <span class="string">'ps aux'</span>
+s = data.read (f,{last_field_collect=<span class="keyword">true</span>})
+f:close()
+<span class="global">print</span>(s.fieldnames)
+<span class="global">print</span>(s:column_by_name <span class="string">'USER'</span>)
+qs = <span class="string">'COMMAND,_MEM where _MEM &gt; 5 and USER=="steve"'</span>
+<span class="keyword">for</span> name,mem <span class="keyword">in</span> s:<span class="global">select</span>(qs) <span class="keyword">do</span>
+    <span class="global">print</span>(mem,name)
+<span class="keyword">end</span>
+</pre>
+
+<p>I've always been an admirer of the AWK programming language; with <a href="../libraries/pl.data.html#filter">filter</a> you
+can get Lua programs which are just as compact:</p>
+
+
+<pre>
+<span class="comment">-- printxy.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+data.filter <span class="string">'x,y where x &gt; 3'</span>
+</pre>
+
+<p>It is common enough to have data files without headers of field names.
+<a href="../libraries/pl.data.html#read">data.read</a> makes a special exception for such files if all fields are numeric.
+Since there are no column names to use in query expressions, you can use AWK-like
+column indexes, e.g. '$1,$2 where $1 > 3'.  I have a little executable script on
+my system called <code>lf</code> which looks like this:</p>
+
+
+<pre>
+#!/usr/bin/env lua
+<span class="global">require</span> <span class="string">'pl.data'</span>.filter(arg[<span class="number">1</span>])
+</pre>
+
+<p>And it can be used generally as a filter command to extract columns from data.
+(The column specifications may be expressions or even constants.)</p>
+
+
+<pre>
+$ lf <span class="string">'$1,$5/10'</span> &lt; test.dat
+</pre>
+
+<p>(As with AWK, please note the single-quotes used in this command; this prevents
+the shell trying to expand the column indexes. If you are on Windows, then you
+must quote the expression in double-quotes so
+it is passed as one argument to your batch file.)</p>
+
+<p>As a tutorial resource, have a look at <a href="../examples/test-data.lua.html#">test-data.lua</a> in the PL tests directory
+for other examples of use, plus comments.</p>
+
+<p>The data returned by <a href="../libraries/pl.data.html#read">read</a> or constructed by <code>Data.copy_select</code> from a query is
+basically just an array of rows: <code>{{1,2},{3,4}}</code>. So you may use <a href="../libraries/pl.data.html#read">read</a> to pull
+in any array-like dataset, and process with any function that expects such a
+implementation. In particular, the functions in <a href="../libraries/pl.array2d.html#">array2d</a> will work fine with
+this data. In fact, these functions are available as methods; e.g.
+<a href="../libraries/pl.array2d.html#flatten">array2d.flatten</a> can be called directly like so to give us a one-dimensional list:</p>
+
+
+<pre>
+v = data.read(<span class="string">'dat.txt'</span>):flatten()
+</pre>
+
+<p>The data is also in exactly the right shape to be treated as matrices by
+<a href="http://lua-users.org/wiki/LuaMatrix">LuaMatrix</a>:</p>
+
+
+<pre>
+&gt; matrix = <span class="global">require</span> <span class="string">'matrix'</span>
+&gt; m = matrix(data.read <span class="string">'mat.txt'</span>)
+&gt; = m
+<span class="number">1</span>       <span class="number">0.2</span>     <span class="number">0.3</span>
+<span class="number">0.2</span>     <span class="number">1</span>       <span class="number">0.1</span>
+<span class="number">0.1</span>     <span class="number">0.2</span>     <span class="number">1</span>
+&gt; = m^<span class="number">2</span>  <span class="comment">-- same as m*m
+</span><span class="number">1.07</span>    <span class="number">0.46</span>    <span class="number">0.62</span>
+<span class="number">0.41</span>    <span class="number">1.06</span>    <span class="number">0.26</span>
+<span class="number">0.24</span>    <span class="number">0.42</span>    <span class="number">1.05</span>
+</pre>
+
+<p><a href="../libraries/pl.data.html#write">write</a> will write matrices back to files for you.</p>
+
+<p>Finally, for the curious, the global variable <code>_DEBUG</code> can be used to print out
+the actual iterator function which a query generates and dynamically compiles. By
+using code generation, we can get pretty much optimal performance out of
+arbitrary queries.</p>
+
+
+<pre>
+&gt; lua -lpl -e <span class="string">"_DEBUG=true"</span> -e <span class="string">"data.filter 'x,y where x &gt; 4 sort by x'"</span> &lt; test.txt
+<span class="keyword">return</span> <span class="keyword">function</span> (t)
+        <span class="keyword">local</span> i = <span class="number">0</span>
+        <span class="keyword">local</span> v
+        <span class="keyword">local</span> ls = {}
+        <span class="keyword">for</span> i,v <span class="keyword">in</span> <span class="global">ipairs</span>(t) <span class="keyword">do</span>
+            <span class="keyword">if</span> v[<span class="number">1</span>] &gt; <span class="number">4</span>  <span class="keyword">then</span>
+                    ls[#ls+<span class="number">1</span>] = v
+            <span class="keyword">end</span>
+        <span class="keyword">end</span>
+        <span class="global">table</span>.sort(ls,<span class="keyword">function</span>(v1,v2)
+            <span class="keyword">return</span> v1[<span class="number">1</span>] &lt; v2[<span class="number">1</span>]
+        <span class="keyword">end</span>)
+        <span class="keyword">local</span> n = #ls
+        <span class="keyword">return</span> <span class="keyword">function</span>()
+            i = i + <span class="number">1</span>
+            v = ls[i]
+            <span class="keyword">if</span> i &gt; n <span class="keyword">then</span> <span class="keyword">return</span> <span class="keyword">end</span>
+            <span class="keyword">return</span> v[<span class="number">1</span>],v[<span class="number">2</span>]
+        <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+<span class="number">10</span>,<span class="number">20</span>
+<span class="number">40</span>,<span class="number">50</span>
+</pre>
+
+<p><a name="Reading_Configuration_Files"></a></p>
+<h3>Reading Configuration Files</h3>
+
+<p>The <a href="../libraries/pl.config.html#">config</a> module provides a simple way to convert several kinds of
+configuration files into a Lua table. Consider the simple example:</p>
+
+
+<pre>
+# test.config
+# Read timeout <span class="keyword">in</span> seconds
+read.timeout=<span class="number">10</span>
+
+# Write timeout <span class="keyword">in</span> seconds
+write.timeout=<span class="number">5</span>
+
+#acceptable ports
+ports = <span class="number">1002</span>,<span class="number">1003</span>,<span class="number">1004</span>
+</pre>
+
+<p>This can be easily brought in using <a href="../libraries/pl.config.html#read">config.read</a> and the result shown using
+<a href="../libraries/pl.pretty.html#write">pretty.write</a>:</p>
+
+
+<pre>
+<span class="comment">-- readconfig.lua
+</span><span class="keyword">local</span> config = <span class="global">require</span> <span class="string">'pl.config'</span>
+<span class="keyword">local</span> pretty= <span class="global">require</span> <span class="string">'pl.pretty'</span>
+
+<span class="keyword">local</span> t = config.read(arg[<span class="number">1</span>])
+<span class="global">print</span>(pretty.write(t))
+</pre>
+
+<p>and the output of <code>lua readconfig.lua test.config</code> is:</p>
+
+
+<pre>
+{
+  ports = {
+    <span class="number">1002</span>,
+    <span class="number">1003</span>,
+    <span class="number">1004</span>
+  },
+  write_timeout = <span class="number">5</span>,
+  read_timeout = <span class="number">10</span>
+}
+</pre>
+
+<p>That is, <a href="../libraries/pl.config.html#read">config.read</a> will bring in all key/value pairs, ignore # comments, and
+ensure that the key names are proper Lua identifiers by replacing non-identifier
+characters with '_'. If the values are numbers, then they will be converted. (So
+the value of <code>t.write_timeout</code> is the number 5). In addition, any values which
+are separated by commas will be converted likewise into an array.</p>
+
+<p>Any line can be continued with a backslash. So this will all be considered one
+line:</p>
+
+
+<pre>
+names=one,two,three, \
+four,five,six,seven, \
+eight,nine,ten
+</pre>
+
+<p>Windows-style INI files are also supported. The section structure of INI files
+translates naturally to nested tables in Lua:</p>
+
+
+<pre>
+; test.ini
+[timeouts]
+read=<span class="number">10</span> ; Read timeout <span class="keyword">in</span> seconds
+write=<span class="number">5</span> ; Write timeout <span class="keyword">in</span> seconds
+[portinfo]
+ports = <span class="number">1002</span>,<span class="number">1003</span>,<span class="number">1004</span>
+</pre>
+
+<p> The output is:</p>
+
+
+<pre>
+{
+  portinfo = {
+    ports = {
+      <span class="number">1002</span>,
+      <span class="number">1003</span>,
+      <span class="number">1004</span>
+    }
+  },
+  timeouts = {
+    write = <span class="number">5</span>,
+    read = <span class="number">10</span>
+  }
+}
+</pre>
+
+<p>You can now refer to the write timeout as <code>t.timeouts.write</code>.</p>
+
+<p>As a final example of the flexibility of <a href="../libraries/pl.config.html#read">config.read</a>, if passed this simple
+comma-delimited file</p>
+
+
+<pre>
+one,two,three
+<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>
+<span class="number">40</span>,<span class="number">50</span>,<span class="number">60</span>
+<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>
+</pre>
+
+<p>it will produce the following table:</p>
+
+
+<pre>
+{
+  { <span class="string">"one"</span>, <span class="string">"two"</span>, <span class="string">"three"</span> },
+  { <span class="number">10</span>, <span class="number">20</span>, <span class="number">30</span> },
+  { <span class="number">40</span>, <span class="number">50</span>, <span class="number">60</span>  },
+  { <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span> }
+}
+</pre>
+
+<p><a href="../libraries/pl.config.html#read">config.read</a> isn't designed to read all CSV files in general, but intended to
+support some Unix configuration files not structured as key-value pairs, such as
+'/etc/passwd'.</p>
+
+<p>This function is intended to be a Swiss Army Knife of configuration readers, but
+it does have to make assumptions, and you may not like them. So there is an
+optional extra parameter which allows some control, which is table that may have
+the following fields:</p>
+
+
+<pre>
+{
+   variablilize = <span class="keyword">true</span>,
+   convert_numbers = <span class="global">tonumber</span>,
+   trim_space = <span class="keyword">true</span>,
+   list_delim = <span class="string">','</span>,
+   trim_quotes = <span class="keyword">true</span>,
+   ignore_assign = <span class="keyword">false</span>,
+   keysep = <span class="string">'='</span>,
+   smart = <span class="keyword">false</span>,
+}
+</pre>
+
+<p><code>variablilize</code> is the option that converted <code>write.timeout</code> in the first example
+to the valid Lua identifier <code>write_timeout</code>.  If <code>convert_numbers</code> is true, then
+an attempt is made to convert any string that starts like a number. You can
+specify your own function (say one that will convert a string like '5224 kb' into
+a number.)</p>
+
+<p><code>trim_space</code> ensures that there is no starting or trailing whitespace with
+values, and <code>list_delim</code> is the character that will be used to decide whether to
+split a value up into a list (it may be a Lua string pattern such as '%s+'.)</p>
+
+<p>For instance, the password file in Unix is colon-delimited:</p>
+
+
+<pre>
+t = config.read(<span class="string">'/etc/passwd'</span>,{list_delim=<span class="string">':'</span>})
+</pre>
+
+<p>This produces the following output on my system (only last two lines shown):</p>
+
+
+<pre>
+{
+  ...
+  {
+    <span class="string">"user"</span>,
+    <span class="string">"x"</span>,
+    <span class="string">"1000"</span>,
+    <span class="string">"1000"</span>,
+    <span class="string">"user,,,"</span>,
+    <span class="string">"/home/user"</span>,
+    <span class="string">"/bin/bash"</span>
+  },
+  {
+    <span class="string">"sdonovan"</span>,
+    <span class="string">"x"</span>,
+    <span class="string">"1001"</span>,
+    <span class="string">"1001"</span>,
+    <span class="string">"steve donovan,28,,"</span>,
+    <span class="string">"/home/sdonovan"</span>,
+    <span class="string">"/bin/bash"</span>
+  }
+}
+</pre>
+
+<p>You can get this into a more sensible format, where the usernames are the keys,
+with this (the <a href="../libraries/pl.tablex.html#pairmap">tablex.pairmap</a> function must return value, key!)</p>
+
+
+<pre>
+t = tablex.pairmap(<span class="keyword">function</span>(k,v) <span class="keyword">return</span> v,v[<span class="number">1</span>] <span class="keyword">end</span>,t)
+</pre>
+
+<p>and you get:</p>
+
+
+<pre>
+{ ...
+  sdonovan = {
+    <span class="string">"sdonovan"</span>,
+    <span class="string">"x"</span>,
+    <span class="string">"1001"</span>,
+    <span class="string">"1001"</span>,
+    <span class="string">"steve donovan,28,,"</span>,
+    <span class="string">"/home/sdonovan"</span>,
+    <span class="string">"/bin/bash"</span>
+  }
+...
+}
+</pre>
+
+<p>Many common Unix configuration files can be read by tweaking these parameters.
+For <code>/etc/fstab</code>, the options <code>{list_delim=&apos;%s+&apos;,ignore_assign=true}</code> will
+correctly separate the columns.  It's common to find 'KEY VALUE' assignments in
+files such as <code>/etc/ssh/ssh_config</code>; the options <code>{keysep=&apos; &apos;}</code> make
+<a href="../libraries/pl.config.html#read">config.read</a> return a table where each KEY has a value VALUE.</p>
+
+<p>Files in the Linux <code>procfs</code> usually use ':` as the field delimiter:</p>
+
+
+<pre>
+&gt; t = config.read(<span class="string">'/proc/meminfo'</span>,{keysep=<span class="string">':'</span>})
+&gt; = t.MemFree
+<span class="number">220140</span> kB
+</pre>
+
+<p>That result is a string, since <a href="https://www.lua.org/manual/5.1/manual.html#pdf-tonumber">tonumber</a> doesn't like it, but defining the
+<code>convert_numbers</code> option as `function(s) return tonumber((s:gsub(' kB$','')))
+end` will get the memory figures as actual numbers in the result. (The extra
+parentheses are necessary so that <a href="https://www.lua.org/manual/5.1/manual.html#pdf-tonumber">tonumber</a> only gets the first result from
+<code>gsub</code>). From `tests/test-config.lua':</p>
+
+
+<pre>
+testconfig(<span class="string">[[
+MemTotal:        1024748 kB
+MemFree:          220292 kB
+]]</span>,
+{ MemTotal = <span class="number">1024748</span>, MemFree = <span class="number">220292</span> },
+{
+ keysep = <span class="string">':'</span>,
+ convert_numbers = <span class="keyword">function</span>(s)
+    s = s:gsub(<span class="string">' kB$'</span>,<span class="string">''</span>)
+    <span class="keyword">return</span> <span class="global">tonumber</span>(s)
+  <span class="keyword">end</span>
+ }
+)
+</pre>
+
+<p>The <code>smart</code> option lets <a href="../libraries/pl.config.html#read">config.read</a> make a reasonable guess for you; there
+are examples in <code>tests/test-config.lua</code>, but basically these common file
+formats (and those following the same pattern) can be processed directly in
+smart mode: 'etc/fstab', '/proc/XXXX/status', 'ssh_config' and 'pdatedb.conf'.</p>
+
+<p>Please note that <a href="../libraries/pl.config.html#read">config.read</a> can be passed a <em>file-like object</em>; if it's not a
+string and supports the <a href="../libraries/pl.data.html#read">read</a> method, then that will be used. For instance, to
+read a configuration from a string, use <a href="../libraries/pl.stringio.html#open">stringio.open</a>.</p>
+
+
+<p><a id="lexer"/></p>
+
+<p><a name="Lexical_Scanning"></a></p>
+<h3>Lexical Scanning</h3>
+
+<p>Although Lua's string pattern matching is very powerful, there are times when
+something more powerful is needed.  <a href="../libraries/pl.lexer.html#scan">pl.lexer.scan</a> provides lexical scanners
+which <em>tokenize</em> a string, classifying tokens into numbers, strings, etc.</p>
+
+
+<pre>
+&gt; lua -lpl
+Lua <span class="number">5.1</span>.<span class="number">4</span>  Copyright (C) <span class="number">1994</span>-<span class="number">2008</span> Lua.org, PUC-Rio
+&gt; tok = lexer.scan <span class="string">'alpha = sin(1.5)'</span>
+&gt; = tok()
+iden    alpha
+&gt; = tok()
+=       =
+&gt; = tok()
+iden    sin
+&gt; = tok()
+(       (
+&gt; = tok()
+number  <span class="number">1.5</span>
+&gt; = tok()
+)       )
+&gt; = tok()
+(<span class="keyword">nil</span>)
+</pre>
+
+<p>The scanner is a function, which is repeatedly called and returns the <em>type</em> and
+<em>value</em> of the token.  Recognized basic types are 'iden','string','number', and
+'space'. and everything else is represented by itself. Note that by default the
+scanner will skip any 'space' tokens.</p>
+
+<p>'comment' and 'keyword' aren't applicable to the plain scanner, which is not
+language-specific, but a scanner which understands Lua is available. It
+recognizes the Lua keywords, and understands both short and long comments and
+strings.</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> t,v <span class="keyword">in</span> lexer.lua <span class="string">'for i=1,n do'</span> <span class="keyword">do</span> <span class="global">print</span>(t,v) <span class="keyword">end</span>
+keyword <span class="keyword">for</span>
+iden    i
+=       =
+number  <span class="number">1</span>
+,       ,
+iden    n
+keyword <span class="keyword">do</span>
+</pre>
+
+<p>A lexical scanner is useful where you have highly-structured data which is not
+nicely delimited by newlines. For example, here is a snippet of a in-house file
+format which it was my task to maintain:</p>
+
+
+<pre>
+points
+    (<span class="number">818344.1</span>,-<span class="number">20389.7</span>,-<span class="number">0.1</span>),(<span class="number">818337.9</span>,-<span class="number">20389.3</span>,-<span class="number">0.1</span>),(<span class="number">818332.5</span>,-<span class="number">20387.8</span>,-<span class="number">0.1</span>)
+    ,(<span class="number">818327.4</span>,-<span class="number">20388</span>,-<span class="number">0.1</span>),(<span class="number">818322</span>,-<span class="number">20387.7</span>,-<span class="number">0.1</span>),(<span class="number">818316.3</span>,-<span class="number">20388.6</span>,-<span class="number">0.1</span>)
+    ,(<span class="number">818309.7</span>,-<span class="number">20389.4</span>,-<span class="number">0.1</span>),(<span class="number">818303.5</span>,-<span class="number">20390.6</span>,-<span class="number">0.1</span>),(<span class="number">818295.8</span>,-<span class="number">20388.3</span>,-<span class="number">0.1</span>)
+    ,(<span class="number">818290.5</span>,-<span class="number">20386.9</span>,-<span class="number">0.1</span>),(<span class="number">818285.2</span>,-<span class="number">20386.1</span>,-<span class="number">0.1</span>),(<span class="number">818279.3</span>,-<span class="number">20383.6</span>,-<span class="number">0.1</span>)
+    ,(<span class="number">818274</span>,-<span class="number">20381.2</span>,-<span class="number">0.1</span>),(<span class="number">818274</span>,-<span class="number">20380.7</span>,-<span class="number">0.1</span>);
+</pre>
+
+<p>Here is code to extract the points using <a href="../libraries/pl.lexer.html#">pl.lexer</a>:</p>
+
+
+<pre>
+<span class="comment">-- assume 's' contains the text above...
+</span><span class="keyword">local</span> lexer = <span class="global">require</span> <span class="string">'pl.lexer'</span>
+<span class="keyword">local</span> expecting = lexer.expecting
+<span class="keyword">local</span> append = <span class="global">table</span>.insert
+
+<span class="keyword">local</span> tok = lexer.scan(s)
+
+<span class="keyword">local</span> points = {}
+<span class="keyword">local</span> t,v = tok() <span class="comment">-- should be 'iden','points'
+</span>
+<span class="keyword">while</span> t ~= <span class="string">';'</span> <span class="keyword">do</span>
+    c = {}
+    expecting(tok,<span class="string">'('</span>)
+    c.x = expecting(tok,<span class="string">'number'</span>)
+    expecting(tok,<span class="string">','</span>)
+    c.y = expecting(tok,<span class="string">'number'</span>)
+    expecting(tok,<span class="string">','</span>)
+    c.z = expecting(tok,<span class="string">'number'</span>)
+    expecting(tok,<span class="string">')'</span>)
+    t,v = tok()  <span class="comment">-- either ',' or ';'
+</span>    append(points,c)
+<span class="keyword">end</span>
+</pre>
+
+<p>The <code>expecting</code> function grabs the next token and if the type doesn't match, it
+throws an error. (<a href="../libraries/pl.lexer.html#">pl.lexer</a>, unlike other PL libraries, raises errors if
+something goes wrong, so you should wrap your code in <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pcall">pcall</a> to catch the error
+gracefully.)</p>
+
+<p>The scanners all have a second optional argument, which is a table which controls
+whether you want to exclude spaces and/or comments. The default for <a href="../libraries/pl.lexer.html#lua">lexer.lua</a>
+is <code>{space=true,comments=true}</code>.  There is a third optional argument which
+determines how string and number tokens are to be processsed.</p>
+
+<p>The ultimate highly-structured data is of course, program source. Here is a
+snippet from 'text-lexer.lua':</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+
+lines = <span class="string">[[
+for k,v in pairs(t) do
+    if type(k) == 'number' then
+        print(v) -- array-like case
+    else
+        print(k,v)
+    end
+end
+]]</span>
+
+ls = List()
+<span class="keyword">for</span> tp,val <span class="keyword">in</span> lexer.lua(lines,{space=<span class="keyword">true</span>,comments=<span class="keyword">true</span>}) <span class="keyword">do</span>
+    <span class="global">assert</span>(tp ~= <span class="string">'space'</span> <span class="keyword">and</span> tp ~= <span class="string">'comment'</span>)
+    <span class="keyword">if</span> tp == <span class="string">'keyword'</span> <span class="keyword">then</span> ls:append(val) <span class="keyword">end</span>
+<span class="keyword">end</span>
+test.asserteq(ls,List{<span class="string">'for'</span>,<span class="string">'in'</span>,<span class="string">'do'</span>,<span class="string">'if'</span>,<span class="string">'then'</span>,<span class="string">'else'</span>,<span class="string">'end'</span>,<span class="string">'end'</span>})
+</pre>
+
+<p>Here is a useful little utility that identifies all common global variables found
+in a lua module (ignoring those declared locally for the moment):</p>
+
+
+<pre>
+<span class="comment">-- testglobal.lua
+</span><span class="global">require</span> <span class="string">'pl'</span>
+
+<span class="keyword">local</span> txt,err = utils.readfile(arg[<span class="number">1</span>])
+<span class="keyword">if</span> <span class="keyword">not</span> txt <span class="keyword">then</span> <span class="keyword">return</span> <span class="global">print</span>(err) <span class="keyword">end</span>
+
+<span class="keyword">local</span> globals = List()
+<span class="keyword">for</span> t,v <span class="keyword">in</span> lexer.lua(txt) <span class="keyword">do</span>
+    <span class="keyword">if</span> t == <span class="string">'iden'</span> <span class="keyword">and</span> _G[v] <span class="keyword">then</span>
+        globals:append(v)
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+pretty.dump(seq.count_map(globals))
+</pre>
+
+<p>Rather then dumping the whole list, with its duplicates, we pass it through
+<a href="../libraries/pl.seq.html#count_map">seq.count_map</a> which turns the list into a table where the keys are the values,
+and the associated values are the number of times those values occur in the
+sequence. Typical output looks like this:</p>
+
+
+<pre>
+{
+  <span class="global">type</span> = <span class="number">2</span>,
+  <span class="global">pairs</span> = <span class="number">2</span>,
+  <span class="global">table</span> = <span class="number">2</span>,
+  <span class="global">print</span> = <span class="number">3</span>,
+  <span class="global">tostring</span> = <span class="number">2</span>,
+  <span class="global">require</span> = <span class="number">1</span>,
+  <span class="global">ipairs</span> = <span class="number">4</span>
+}
+</pre>
+
+<p>You could further pass this through <a href="../libraries/pl.tablex.html#keys">tablex.keys</a> to get a unique list of
+symbols. This can be useful when writing 'strict' Lua modules, where all global
+symbols must be defined as locals at the top of the file.</p>
+
+<p>For a more detailed use of <a href="../libraries/pl.lexer.html#scan">lexer.scan</a>, please look at <a href="../examples/testxml.lua.html#">testxml.lua</a> in the
+examples directory.</p>
+
+<p><a name="XML"></a></p>
+<h3>XML</h3>
+
+<p>New in the 0.9.7 release is some support for XML. This is a large topic, and
+Penlight does not provide a full XML stack, which is properly the task of a more
+specialized library.</p>
+
+<h4>Parsing and Pretty-Printing</h4>
+
+<p>The semi-standard XML parser in the Lua universe is <a href="http://matthewwild.co.uk/projects/luaexpat/">lua-expat</a>.
+In particular,
+it has a function called <code>lxp.lom.parse</code> which will parse XML into the Lua Object
+Model (LOM) format. However, it does not provide a way to convert this data back
+into XML text.  <a href="../libraries/pl.xml.html#parse">xml.parse</a> will use this function, <em>if</em> <code>lua-expat</code> is
+available, and otherwise switches back to a pure Lua parser originally written by
+Roberto Ierusalimschy.</p>
+
+<p>The resulting document object knows how to render itself as a string, which is
+useful for debugging:</p>
+
+
+<pre>
+&gt; d = xml.parse <span class="string">"&lt;nodes&gt;&lt;node id='1'&gt;alice&lt;/node&gt;&lt;/nodes&gt;"</span>
+&gt; = d
+&lt;nodes&gt;&lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;&lt;/nodes&gt;
+&gt; pretty.dump (d)
+{
+  {
+    <span class="string">"alice"</span>,
+    attr = {
+      <span class="string">"id"</span>,
+      id = <span class="string">"1"</span>
+    },
+    tag = <span class="string">"node"</span>
+  },
+  attr = {
+  },
+  tag = <span class="string">"nodes"</span>
+}
+</pre>
+
+<p>Looking at the actual shape of the data reveals the structure of LOM:</p>
+
+<ul>
+    <li>every element has a <code>tag</code> field with its name</li>
+    <li>plus a <code>attr</code> field which is a table containing the attributes as fields, and
+    also as an array. It is always present.</li>
+    <li>the children of the element are the array part of the element, so <code>d[1]</code> is
+    the first child of <code>d</code>, etc.</li>
+</ul>
+
+<p>It could be argued that having attributes also as the array part of <code>attr</code> is not
+essential (you cannot depend on attribute order in XML) but that's how
+it goes with this standard.</p>
+
+<p><code>lua-expat</code> is another <em>soft dependency</em> of Penlight; generally, the fallback
+parser is good enough for straightforward XML as is commonly found in
+configuration files, etc. <code>doc.basic_parse</code> is not intended to be a proper
+conforming parser (it's only sixty lines) but it handles simple kinds of
+documents that do not have comments or DTD directives. It is intelligent enough
+to ignore the <code>&lt;?xml</code> directive and that is about it.</p>
+
+<p>You can get pretty-printing by explicitly calling <a href="../libraries/pl.xml.html#tostring">xml.tostring</a> and passing it
+the initial indent and the per-element indent:</p>
+
+
+<pre>
+&gt; = xml.<span class="global">tostring</span>(d,<span class="string">''</span>,<span class="string">'  '</span>)
+
+&lt;nodes&gt;
+  &lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;
+&lt;/nodes&gt;
+</pre>
+
+<p>There is a fourth argument which is the <em>attribute indent</em>:</p>
+
+
+<pre>
+&gt; a = xml.parse <span class="string">"&lt;frodo name='baggins' age='50' type='hobbit'/&gt;"</span>
+&gt; = xml.<span class="global">tostring</span>(a,<span class="string">''</span>,<span class="string">'  '</span>,<span class="string">'  '</span>)
+
+&lt;frodo
+  <span class="global">type</span>=<span class="string">'hobbit'</span>
+  name=<span class="string">'baggins'</span>
+  age=<span class="string">'50'</span>
+/&gt;
+</pre>
+
+<h4>Parsing and Working with Configuration Files</h4>
+
+<p>It's common to find configurations expressed with XML these days. It's
+straightforward to 'walk' the <a href="http://matthewwild.co.uk/projects/luaexpat/lom.html">LOM</a>
+data and extract the data in the form you want:</p>
+
+
+<pre>
+<span class="global">require</span> <span class="string">'pl'</span>
+
+<span class="keyword">local</span> config = <span class="string">[[
+&lt;config&gt;
+    &lt;alpha&gt;1.3&lt;/alpha&gt;
+    &lt;beta&gt;10&lt;/beta&gt;
+    &lt;name&gt;bozo&lt;/name&gt;
+&lt;/config&gt;
+]]</span>
+<span class="keyword">local</span> d,err = xml.parse(config)
+
+<span class="keyword">local</span> t = {}
+<span class="keyword">for</span> item <span class="keyword">in</span> d:childtags() <span class="keyword">do</span>
+    t[item.tag] = item[<span class="number">1</span>]
+<span class="keyword">end</span>
+
+pretty.dump(t)
+<span class="comment">---&gt;
+</span>{
+  beta = <span class="string">"10"</span>,
+  alpha = <span class="string">"1.3"</span>,
+  name = <span class="string">"bozo"</span>
+}
+</pre>
+
+<p>The only gotcha is that here we must use the <code>Doc:childtags</code> method, which will
+skip over any text elements.</p>
+
+<p>A more involved example is this excerpt from <code>serviceproviders.xml</code>, which is
+usually found at <code>/usr/share/mobile-broadband-provider-info/serviceproviders.xml</code>
+on Debian/Ubuntu Linux systems.</p>
+
+
+<pre>
+d = xml.parse <span class="string">[[
+&lt;serviceproviders format="2.0"&gt;
+...
+&lt;country code="za"&gt;
+    &lt;provider&gt;
+        &lt;name&gt;Cell-c&lt;/name&gt;
+        &lt;gsm&gt;
+            &lt;network-id mcc="655" mnc="07"/&gt;
+            &lt;apn value="internet"&gt;
+                &lt;username&gt;Cellcis&lt;/username&gt;
+                &lt;dns&gt;196.7.0.138&lt;/dns&gt;
+                &lt;dns&gt;196.7.142.132&lt;/dns&gt;
+            &lt;/apn&gt;
+        &lt;/gsm&gt;
+    &lt;/provider&gt;
+    &lt;provider&gt;
+        &lt;name&gt;MTN&lt;/name&gt;
+        &lt;gsm&gt;
+            &lt;network-id mcc="655" mnc="10"/&gt;
+            &lt;apn value="internet"&gt;
+                &lt;dns&gt;196.11.240.241&lt;/dns&gt;
+                &lt;dns&gt;209.212.97.1&lt;/dns&gt;
+            &lt;/apn&gt;
+        &lt;/gsm&gt;
+    &lt;/provider&gt;
+    &lt;provider&gt;
+        &lt;name&gt;Vodacom&lt;/name&gt;
+        &lt;gsm&gt;
+            &lt;network-id mcc="655" mnc="01"/&gt;
+            &lt;apn value="internet"&gt;
+                &lt;dns&gt;196.207.40.165&lt;/dns&gt;
+                &lt;dns&gt;196.43.46.190&lt;/dns&gt;
+            &lt;/apn&gt;
+            &lt;apn value="unrestricted"&gt;
+                &lt;name&gt;Unrestricted&lt;/name&gt;
+                &lt;dns&gt;196.207.32.69&lt;/dns&gt;
+                &lt;dns&gt;196.43.45.190&lt;/dns&gt;
+            &lt;/apn&gt;
+        &lt;/gsm&gt;
+    &lt;/provider&gt;
+    &lt;provider&gt;
+        &lt;name&gt;Virgin Mobile&lt;/name&gt;
+        &lt;gsm&gt;
+            &lt;apn value="vdata"&gt;
+                &lt;dns&gt;196.7.0.138&lt;/dns&gt;
+                &lt;dns&gt;196.7.142.132&lt;/dns&gt;
+            &lt;/apn&gt;
+        &lt;/gsm&gt;
+    &lt;/provider&gt;
+&lt;/country&gt;
+....
+&lt;/serviceproviders&gt;
+]]</span>
+</pre>
+
+<p>Getting the names of the providers per-country is straightforward:</p>
+
+
+<pre>
+<span class="keyword">local</span> t = {}
+<span class="keyword">for</span> country <span class="keyword">in</span> d:childtags() <span class="keyword">do</span>
+    <span class="keyword">local</span> providers = {}
+    t[country.attr.code] = providers
+    <span class="keyword">for</span> provider <span class="keyword">in</span> country:childtags() <span class="keyword">do</span>
+        <span class="global">table</span>.insert(providers,provider:child_with_name(<span class="string">'name'</span>):get_text())
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+pretty.dump(t)
+<span class="comment">--&gt;
+</span>{
+  za = {
+    <span class="string">"Cell-c"</span>,
+    <span class="string">"MTN"</span>,
+    <span class="string">"Vodacom"</span>,
+    <span class="string">"Virgin Mobile"</span>
+  }
+  ....
+}
+</pre>
+
+<h4>Generating XML with 'xmlification'</h4>
+
+<p>This feature is inspired by the <code>htmlify</code> function used by
+<a href="http://keplerproject.github.com/orbit/">Orbit</a> to simplify HTML generation,
+except that no function environment magic is used; the <code>tags</code> function returns a
+set of <em>constructors</em> for elements of the given tag names.</p>
+
+
+<pre>
+&gt; nodes, node = xml.tags <span class="string">'nodes, node'</span>
+&gt; = node <span class="string">'alice'</span>
+&lt;node&gt;alice&lt;/node&gt;
+&gt; = nodes { node {id=<span class="string">'1'</span>,<span class="string">'alice'</span>}}
+&lt;nodes&gt;&lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;&lt;/nodes&gt;
+</pre>
+
+<p>The flexibility of Lua tables is very useful here, since both the attributes and
+the children of an element can be encoded naturally. The argument to these tag
+constructors is either a single value (like a string) or a table where the
+attributes are the named keys and the children are the array values.</p>
+
+<h4>Generating XML using Templates</h4>
+
+<p>A template is a little XML document which contains dollar-variables. The <code>subst</code>
+method on a document is fed an array of tables containing values for these
+variables. Note how the parent tag name is specified:</p>
+
+
+<pre>
+&gt; templ = xml.parse <span class="string">"&lt;node id='$id'&gt;$name&lt;/node&gt;"</span>
+&gt; = templ:subst {tag=<span class="string">'nodes'</span>, {id=<span class="number">1</span>,name=<span class="string">'alice'</span>},{id=<span class="number">2</span>,name=<span class="string">'john'</span>}}
+&lt;nodes&gt;&lt;node id=<span class="string">'1'</span>&gt;alice&lt;/node&gt;&lt;node id=<span class="string">'2'</span>&gt;john&lt;/node&gt;&lt;/nodes&gt;
+</pre>
+
+<p>Substitution is very related to <em>filtering</em> documents. One of the annoying things
+about XML is that it is a document markup language first, and a data language
+second. Standard parsers will assume you really care about all those extra
+text elements. Consider this fragment, which has been changed by a five-year old:</p>
+
+
+<pre>
+T = <span class="string">[[
+  &lt;weather&gt;
+    boops!
+    &lt;current_conditions&gt;
+      &lt;condition data='$condition'/&gt;
+      &lt;temp_c data='$temp'/&gt;
+      &lt;bo&gt;whoops!&lt;/bo&gt;
+    &lt;/current_conditions&gt;
+  &lt;/weather&gt;
+]]</span>
+</pre>
+
+<p>Conformant parsers will give you text elements with the line feed after <code>&lt;current_conditions&gt;</code>
+although it makes handling the data more irritating.</p>
+
+
+<pre>
+<span class="keyword">local</span> <span class="keyword">function</span> parse (str)
+    <span class="keyword">return</span> xml.parse(str,<span class="keyword">false</span>,<span class="keyword">true</span>)
+<span class="keyword">end</span>
+</pre>
+
+<p>Second argument means 'string, not file' and third argument means use the built-in
+Lua parser (instead of LuaExpat if available) which <em>by default</em> is not interested in
+keeping such strings.</p>
+
+<p>How to remove the string <code>boops!</code>?  <code>clone</code> (also called <a href="../libraries/pl.data.html#filter">filter</a> when called as a
+method) copies a LOM document. It can be passed a filter function, which is applied
+to each string found. The powerful thing about this is that this function receives
+structural information - the parent node, and whether this was a tag name, a text
+element or a attribute name:</p>
+
+
+<pre>
+d = parse (T)
+c = d:filter(<span class="keyword">function</span>(s,kind,parent)
+    <span class="global">print</span>(stringx.strip(s),kind,parent <span class="keyword">and</span> parent.tag <span class="keyword">or</span> <span class="string">'?'</span>)
+    <span class="keyword">if</span> kind == <span class="string">'*TEXT'</span> <span class="keyword">and</span> #parent &gt; <span class="number">1</span> <span class="keyword">then</span> <span class="keyword">return</span> <span class="keyword">nil</span> <span class="keyword">end</span>
+    <span class="keyword">return</span> s
+<span class="keyword">end</span>)
+<span class="comment">---&gt;
+</span>weather    *TAG    ?
+boops!    *TEXT    weather
+current_conditions    *TAG    weather
+condition    *TAG    current_conditions
+$condition    data    condition
+temp_c    *TAG    current_conditions
+$temp    data    temp_c
+bo    *TAG    current_conditions
+whoops!    *TEXT    bo
+</pre>
+
+<p>We can pull out 'boops' and not 'whoops' by discarding text elements which are not
+the single child of an element.</p>
+
+
+
+<h4>Extracting Data using Templates</h4>
+
+<p>Matching goes in the opposite direction.  We have a document, and would like to
+extract values from it using a pattern.</p>
+
+<p>A common use of this is parsing the XML result of API queries.  The
+<a href="http://blog.programmableweb.com/2010/02/08/googles-secret-weather-api/">(undocumented and subsequently discontinued) Google Weather
+API</a> is a
+good example. Grabbing the result of
+`http://www.google.com/ig/api?weather=Johannesburg,ZA" we get something like
+this, after pretty-printing:</p>
+
+
+<pre>
+&lt;xml_api_reply version=<span class="string">'1'</span>&gt;
+  &lt;weather module_id=<span class="string">'0'</span> tab_id=<span class="string">'0'</span> mobile_zipped=<span class="string">'1'</span> section=<span class="string">'0'</span> row=<span class="string">'0'</span>
+</pre>
+
+<p>mobile_row='0'></p>
+
+<pre>
+&lt;forecast_information&gt;
+  &lt;city data=<span class="string">'Johannesburg, Gauteng'</span>/&gt;
+  &lt;postal_code data=<span class="string">'Johannesburg,ZA'</span>/&gt;
+  &lt;latitude_e6 data=<span class="string">''</span>/&gt;
+  &lt;longitude_e6 data=<span class="string">''</span>/&gt;
+  &lt;forecast_date data=<span class="string">'2010-10-02'</span>/&gt;
+  &lt;current_date_time data=<span class="string">'2010-10-02 18:30:00 +0000'</span>/&gt;
+  &lt;unit_system data=<span class="string">'US'</span>/&gt;
+&lt;/forecast_information&gt;
+&lt;current_conditions&gt;
+  &lt;condition data=<span class="string">'Clear'</span>/&gt;
+  &lt;temp_f data=<span class="string">'75'</span>/&gt;
+  &lt;temp_c data=<span class="string">'24'</span>/&gt;
+  &lt;humidity data=<span class="string">'Humidity: 19%'</span>/&gt;
+  &lt;icon data=<span class="string">'/ig/images/weather/sunny.gif'</span>/&gt;
+  &lt;wind_condition data=<span class="string">'Wind: NW at 7 mph'</span>/&gt;
+&lt;/current_conditions&gt;
+&lt;forecast_conditions&gt;
+  &lt;day_of_week data=<span class="string">'Sat'</span>/&gt;
+  &lt;low data=<span class="string">'60'</span>/&gt;
+  &lt;high data=<span class="string">'89'</span>/&gt;
+  &lt;icon data=<span class="string">'/ig/images/weather/sunny.gif'</span>/&gt;
+  &lt;condition data=<span class="string">'Clear'</span>/&gt;
+&lt;/forecast_conditions&gt;
+....
+/weather&gt;
+l_api_reply&gt;
+</pre>
+
+<p>Assume that the above XML has been read into <code>google</code>. The idea is to write a
+pattern looking like a template, and use it to extract some values of interest:</p>
+
+
+<pre>
+t = <span class="string">[[
+  &lt;weather&gt;
+    &lt;current_conditions&gt;
+      &lt;condition data='$condition'/&gt;
+      &lt;temp_c data='$temp'/&gt;
+    &lt;/current_conditions&gt;
+  &lt;/weather&gt;
+]]</span>
+
+<span class="keyword">local</span> res, ret = google:match(t)
+pretty.dump(res)
+</pre>
+
+<p>And the output is:</p>
+
+
+<pre>
+{
+  condition = <span class="string">"Clear"</span>,
+  temp = <span class="string">"24"</span>
+}
+</pre>
+
+<p>The <code>match</code> method can be passed a LOM document or some text, which will be
+parsed first.</p>
+
+<p>But what if we need to extract values from repeated elements? Match templates may
+contain 'array matches' which are enclosed in '{{..}}':</p>
+
+
+<pre>
+&lt;weather&gt;
+  {{&lt;forecast_conditions&gt;
+    &lt;day_of_week data=<span class="string">'$day'</span>/&gt;
+    &lt;low data=<span class="string">'$low'</span>/&gt;
+    &lt;high data=<span class="string">'$high'</span>/&gt;
+    &lt;condition data=<span class="string">'$condition'</span>/&gt;
+  &lt;/forecast_conditions&gt;}}
+&lt;/weather&gt;
+</pre>
+
+<p>And the match result is:</p>
+
+
+<pre>
+{
+  {
+    low = <span class="string">"60"</span>,
+    high = <span class="string">"89"</span>,
+    day = <span class="string">"Sat"</span>,
+    condition = <span class="string">"Clear"</span>,
+  },
+  {
+    low = <span class="string">"53"</span>,
+    high = <span class="string">"86"</span>,
+    day = <span class="string">"Sun"</span>,
+    condition = <span class="string">"Clear"</span>,
+  },
+  {
+    low = <span class="string">"57"</span>,
+    high = <span class="string">"87"</span>,
+    day = <span class="string">"Mon"</span>,
+    condition = <span class="string">"Clear"</span>,
+  },
+  {
+    low = <span class="string">"60"</span>,
+    high = <span class="string">"84"</span>,
+    day = <span class="string">"Tue"</span>,
+    condition = <span class="string">"Clear"</span>,
+  }
+}
+</pre>
+
+<p>With this array of tables, you can use <a href="../libraries/pl.tablex.html#">tablex</a> or <a href="../classes/pl.List.html#">List</a>
+to reshape into the desired form, if you choose.  Just as with reading a Unix password
+file with <a href="../libraries/pl.config.html#">config</a>, you can make the array into a map of days to conditions using:</p>
+
+
+<pre>
+<span class="backtick"><a href="../libraries/pl.tablex.html#pairmap">tablex.pairmap</a></span>(<span class="string">'|k,v| v,v.day'</span>,conditions)
+</pre>
+
+<p>(Here using the alternative string lambda option)</p>
+
+<p>However, xml matches can shape the structure of the output. By replacing the <code>day_of_week</code>
+line of the template with <code>&lt;day_of_week data=&apos;$_&apos;/&gt;</code> we get the same effect; <code>$_</code> is
+a special symbol that means that this captured value (or simply <em>capture</em>) becomes the key.</p>
+
+<p>Note that <code>$NUMBER</code> means a numerical index, so
+that <code>$1</code> is the first element of the resulting array, and so forth. You can mix
+numbered and named captures, but it's strongly advised to make the numbered captures
+form a proper array sequence (everything from <code>1</code> to <code>n</code> inclusive). <code>$0</code> has a
+special meaning; if it is the only capture (<code>{[0]=&apos;foo&apos;}</code>) then the table is
+collapsed into 'foo'.</p>
+
+
+<pre>
+&lt;weather&gt;
+  {{&lt;forecast_conditions&gt;
+    &lt;day_of_week data=<span class="string">'$_'</span>/&gt;
+    &lt;low data=<span class="string">'$1'</span>/&gt;
+    &lt;high data=<span class="string">'$2'</span>/&gt;
+    &lt;condition data=<span class="string">'$3'</span>/&gt;
+  &lt;/forecast_conditions&gt;}}
+&lt;/weather&gt;
+</pre>
+
+<p>Now the result is:</p>
+
+
+<pre>
+{
+  Tue = {
+    <span class="string">"60"</span>,
+    <span class="string">"84"</span>,
+    <span class="string">"Clear"</span>
+  },
+  Sun = {
+    <span class="string">"53"</span>,
+    <span class="string">"86"</span>,
+    <span class="string">"Clear"</span>
+  },
+  Sat = {
+    <span class="string">"60"</span>,
+    <span class="string">"89"</span>,
+    <span class="string">"Clear"</span>
+  },
+  Mon = {
+    <span class="string">"57"</span>,
+    <span class="string">"87"</span>,
+    <span class="string">"Clear"</span>
+  }
+}
+</pre>
+
+<p>Applying matches to this config file poses another problem, because the actual
+tags matched are themselves meaningful.</p>
+
+
+<pre>
+&lt;config&gt;
+    &lt;alpha&gt;<span class="number">1.3</span>&lt;/alpha&gt;
+    &lt;beta&gt;<span class="number">10</span>&lt;/beta&gt;
+    &lt;name&gt;bozo&lt;/name&gt;
+&lt;/config&gt;
+</pre>
+
+<p>So there are tag 'wildcards' which are element names ending with a hyphen.</p>
+
+
+<pre>
+&lt;config&gt;
+    {{&lt;key-&gt;$value&lt;/key-&gt;}}
+&lt;/config&gt;
+</pre>
+
+<p>You will then get <code>{{alpha=&apos;1.3&apos;},...}</code>. The most convenient format would be
+returned by this (note that <code>_-</code> behaves just like <code>$_</code>):</p>
+
+
+<pre>
+&lt;config&gt;
+    {{&lt;_-&gt;$<span class="number">0</span>&lt;/_-&gt;}}
+&lt;/config&gt;
+</pre>
+
+<p>which would return <code>{alpha=&apos;1.3&apos;,beta=&apos;10&apos;,name=&apos;bozo&apos;}</code>.</p>
+
+<p>We could play this game endlessly, and encode ways of converting captures, but
+the scheme is complex enough, and it's easy to do the conversion later</p>
+
+
+<pre>
+<span class="keyword">local</span> numbers = {alpha=<span class="keyword">true</span>,beta=<span class="keyword">true</span>}
+<span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(res) <span class="keyword">do</span>
+    <span class="keyword">if</span> numbers[v] <span class="keyword">then</span> res[k] = <span class="global">tonumber</span>(v) <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<h4>HTML Parsing</h4>
+
+<p>HTML is an unusually degenerate form of XML, and Dennis Schridde has contributed
+a feature which makes parsing it easier.  For instance, from the tests:</p>
+
+
+<pre>
+doc = xml.parsehtml <span class="string">[[
+&lt;BODY&gt;
+Hello dolly&lt;br&gt;
+HTML is &lt;b&gt;slack&lt;/b&gt;&lt;br&gt;
+&lt;/BODY&gt;
+]]</span>
+
+asserteq(xml.<span class="global">tostring</span>(doc),<span class="string">[[
+&lt;body&gt;
+Hello dolly&lt;br/&gt;
+HTML is &lt;b&gt;slack&lt;/b&gt;&lt;br/&gt;&lt;/body&gt;]]</span>)
+</pre>
+
+<p>That is, all tags are converted to lowercase, and empty HTML elements like <code>br</code>
+are properly closed; attributes do not need to be quoted.</p>
+
+<p>Also, DOCTYPE directives and comments are skipped. For truly badly formed HTML,
+this is not the tool for you!</p>
+
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/07-functional.md.html b/Data/Libraries/Penlight/docs/manual/07-functional.md.html
new file mode 100644
index 0000000..d4ca655
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/07-functional.md.html
@@ -0,0 +1,834 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Sequences">Sequences </a></li>
+<li><a href="#Sequence_Wrappers">Sequence Wrappers </a></li>
+<li><a href="#List_Comprehensions">List Comprehensions </a></li>
+<li><a href="#Creating_Functions_from_Functions">Creating Functions from Functions </a></li>
+<li><a href="#Placeholder_Expressions">Placeholder Expressions </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><strong>Functional Programming</strong></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Functional Programming</h2>
+
+<p><a name="Sequences"></a></p>
+<h3>Sequences</h3>
+
+
+<p>A Lua iterator (in its simplest form) is a function which can be repeatedly
+called to return a set of one or more values. The <code>for in</code> statement understands
+these iterators, and loops until the function returns <code>nil</code>. There are standard
+sequence adapters for tables in Lua (<a href="https://www.lua.org/manual/5.1/manual.html#pdf-ipairs">ipairs</a> and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pairs">pairs</a>), and <a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.lines">io.lines</a>
+returns an iterator over all the lines in a file. In the Penlight libraries, such
+iterators are also called <em>sequences</em>.  A sequence of single values (say from
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.lines">io.lines</a>) is called <em>single-valued</em>, whereas the sequence defined by <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pairs">pairs</a> is
+<em>double-valued</em>.</p>
+
+<p><a href="../libraries/pl.seq.html#">pl.seq</a> provides a number of useful iterators, and some functions which operate
+on sequences.  At first sight this example looks like an attempt to write Python
+in Lua, (with the sequence being inclusive):</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> i <span class="keyword">in</span> seq.range(<span class="number">1</span>,<span class="number">4</span>) <span class="keyword">do</span> <span class="global">print</span>(i) <span class="keyword">end</span>
+<span class="number">1</span>
+<span class="number">2</span>
+<span class="number">3</span>
+<span class="number">4</span>
+</pre>
+
+<p>But <a href="../libraries/pl.seq.html#range">range</a> is actually equivalent to Python's <code>xrange</code>, since it generates a
+sequence, not a list.  To get a list, use <code>seq.copy(seq.range(1,10))</code>, which
+takes any single-value sequence and makes a table from the result. <a href="../libraries/pl.seq.html#list">seq.list</a> is
+like <a href="https://www.lua.org/manual/5.1/manual.html#pdf-ipairs">ipairs</a> except that it does not give you the index, just the value.</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> x <span class="keyword">in</span> seq.list {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>} <span class="keyword">do</span> <span class="global">print</span>(x) <span class="keyword">end</span>
+<span class="number">1</span>
+<span class="number">2</span>
+<span class="number">3</span>
+</pre>
+
+<p><a href="../libraries/pl.seq.html#enum">enum</a> takes a sequence and turns it into a double-valued sequence consisting of
+a sequence number and the value, so <code>enum(list(ls))</code> is actually equivalent to
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-ipairs">ipairs</a>. A more interesting example prints out a file with line numbers:</p>
+
+
+<pre>
+<span class="keyword">for</span> i,v <span class="keyword">in</span> seq.enum(<span class="global">io</span>.lines(fname)) <span class="keyword">do</span> <span class="global">print</span>(i..<span class="string">' '</span>..v) <span class="keyword">end</span>
+</pre>
+
+<p>Sequences can be <em>combined</em>, either by 'zipping' them or by concatenating them.</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> x,y <span class="keyword">in</span> seq.zip(l1,l2) <span class="keyword">do</span> <span class="global">print</span>(x,y) <span class="keyword">end</span>
+<span class="number">10</span>      <span class="number">1</span>
+<span class="number">20</span>      <span class="number">2</span>
+<span class="number">30</span>      <span class="number">3</span>
+&gt; <span class="keyword">for</span> x <span class="keyword">in</span> seq.splice(l1,l2) <span class="keyword">do</span> <span class="global">print</span>(x) <span class="keyword">end</span>
+<span class="number">10</span>
+<span class="number">20</span>
+<span class="number">30</span>
+<span class="number">1</span>
+<span class="number">2</span>
+<span class="number">3</span>
+</pre>
+
+<p><a href="../libraries/pl.seq.html#printall">seq.printall</a> is useful for printing out single-valued sequences, and provides
+some finer control over formating, such as a delimiter, the number of fields per
+line, and a format string to use (@see string.format)</p>
+
+
+<pre>
+&gt; seq.printall(seq.random(<span class="number">10</span>))
+<span class="number">0.0012512588885159</span> <span class="number">0.56358531449324</span> <span class="number">0.19330423902097</span> ....
+&gt; seq.printall(seq.random(<span class="number">10</span>), <span class="string">','</span>, <span class="number">4</span>, <span class="string">'%4.2f'</span>)
+<span class="number">0.17</span>,<span class="number">0.86</span>,<span class="number">0.71</span>,<span class="number">0.51</span>
+<span class="number">0.30</span>,<span class="number">0.01</span>,<span class="number">0.09</span>,<span class="number">0.36</span>
+<span class="number">0.15</span>,<span class="number">0.17</span>,
+</pre>
+
+<p><a href="../libraries/pl.seq.html#map">map</a> will apply a function to a sequence.</p>
+
+
+<pre>
+&gt; seq.printall(seq.map(<span class="global">string</span>.upper, {<span class="string">'one'</span>,<span class="string">'two'</span>}))
+ONE TWO
+&gt; seq.printall(seq.map(<span class="string">'+'</span>, {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}, <span class="number">1</span>))
+<span class="number">11</span> <span class="number">21</span> <span class="number">31</span>
+</pre>
+
+<p><a href="../libraries/pl.seq.html#filter">filter</a> will filter a sequence using a boolean function (often called a
+<em>predicate</em>). For instance, this code only prints lines in a file which are
+composed of digits:</p>
+
+
+<pre>
+<span class="keyword">for</span> l <span class="keyword">in</span> seq.filter(<span class="global">io</span>.lines(file), stringx.isdigit) <span class="keyword">do</span> <span class="global">print</span>(l) <span class="keyword">end</span>
+</pre>
+
+<p>The following returns a table consisting of all the positive values in the
+original table (equivalent to <code>tablex.filter(ls, &apos;&gt;&apos;, 0)</code>)</p>
+
+
+<pre>
+ls = seq.copy(seq.filter(ls, <span class="string">'&gt;'</span>, <span class="number">0</span>))
+</pre>
+
+<p>We're already encounted <a href="../libraries/pl.seq.html#sum">seq.sum</a> when discussing <a href="../libraries/pl.input.html#numbers">input.numbers</a>. This can also
+be expressed with <a href="../libraries/pl.seq.html#reduce">seq.reduce</a>:</p>
+
+
+<pre>
+&gt; seq.reduce(<span class="keyword">function</span>(x,y) <span class="keyword">return</span> x + y <span class="keyword">end</span>, seq.list{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+<span class="number">10</span>
+</pre>
+
+<p><a href="../libraries/pl.seq.html#reduce">seq.reduce</a> applies a binary function in a recursive fashion, so that:</p>
+
+
+<pre>
+reduce(op,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}) =&gt; op(<span class="number">1</span>,reduce(op,{<span class="number">2</span>,<span class="number">3</span>}) =&gt; op(<span class="number">1</span>,op(<span class="number">2</span>,<span class="number">3</span>))
+</pre>
+
+<p>it's now possible to easily generate other cumulative operations; the standard
+operations declared in <a href="../libraries/pl.operator.html#">pl.operator</a> are useful here:</p>
+
+
+<pre>
+&gt; ops = <span class="global">require</span> <span class="string">'pl.operator'</span>
+&gt; <span class="comment">-- can also say '*' instead of ops.mul
+</span>&gt; = seq.reduce(ops.mul,input.numbers <span class="string">'1 2 3 4'</span>)
+<span class="number">24</span>
+</pre>
+
+<p>There are functions to extract statistics from a sequence of numbers:</p>
+
+
+<pre>
+&gt; l1 = List {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+&gt; l2 = List {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+&gt; = seq.minmax(l1)
+<span class="number">10</span>      <span class="number">30</span>
+&gt; = seq.sum(l1)
+<span class="number">60</span>      <span class="number">3</span>
+</pre>
+
+<p>It is common to get sequences where values are repeated, say the words in a file.
+<a href="../libraries/pl.seq.html#count_map">count_map</a> will take such a sequence and count the values, returning a table
+where the <em>keys</em> are the unique values, and the value associated with each key is
+the number of times they occurred:</p>
+
+
+<pre>
+&gt; t = seq.count_map {<span class="string">'one'</span>,<span class="string">'fred'</span>,<span class="string">'two'</span>,<span class="string">'one'</span>,<span class="string">'two'</span>,<span class="string">'two'</span>}
+&gt; = t
+{one=<span class="number">2</span>,fred=<span class="number">1</span>,two=<span class="number">3</span>}
+</pre>
+
+<p>This will also work on numerical sequences, but you cannot expect the result to
+be a proper list, i.e. having no 'holes'. Instead, you always need to use <a href="https://www.lua.org/manual/5.1/manual.html#pdf-pairs">pairs</a>
+to iterate over the result - note that there is a hole at index 5:</p>
+
+
+<pre>
+&gt; t = seq.count_map {<span class="number">1</span>,<span class="number">2</span>,<span class="number">4</span>,<span class="number">2</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">2</span>,<span class="number">6</span>}
+&gt; <span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(t) <span class="keyword">do</span> <span class="global">print</span>(k,v) <span class="keyword">end</span>
+<span class="number">1</span>       <span class="number">1</span>
+<span class="number">2</span>       <span class="number">4</span>
+<span class="number">3</span>       <span class="number">1</span>
+<span class="number">4</span>       <span class="number">2</span>
+<span class="number">6</span>       <span class="number">1</span>
+</pre>
+
+<p><code>unique</code> uses <a href="../libraries/pl.seq.html#count_map">count_map</a> to return a list of the unique values, that is, just
+the keys of the resulting table.</p>
+
+<p><a href="../libraries/pl.seq.html#last">last</a> turns a single-valued sequence into a double-valued sequence with the
+current value and the last value:</p>
+
+
+<pre>
+&gt; <span class="keyword">for</span> current,last <span class="keyword">in</span> seq.last {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>,<span class="number">40</span>} <span class="keyword">do</span> <span class="global">print</span> (current,last) <span class="keyword">end</span>
+<span class="number">20</span>      <span class="number">10</span>
+<span class="number">30</span>      <span class="number">20</span>
+<span class="number">40</span>      <span class="number">30</span>
+</pre>
+
+<p>This makes it easy to do things like identify repeated lines in a file, or
+construct differences between values. <a href="../libraries/pl.seq.html#filter">filter</a> can handle double-valued sequences
+as well, so one could filter such a sequence to only return cases where the
+current value is less than the last value by using <a href="../libraries/pl.operator.html#lt">operator.lt</a> or just '&lt;'.
+This code then copies the resulting code into a table.</p>
+
+
+<pre>
+&gt; ls = {<span class="number">10</span>,<span class="number">9</span>,<span class="number">10</span>,<span class="number">3</span>}
+&gt; = seq.copy(seq.filter(seq.last(s),<span class="string">'&lt;'</span>))
+{<span class="number">9</span>,<span class="number">3</span>}
+</pre>
+
+<p><a name="Sequence_Wrappers"></a></p>
+<h3>Sequence Wrappers</h3>
+
+<p>The functions in <a href="../libraries/pl.seq.html#">pl.seq</a> cover the common patterns when dealing with sequences,
+but chaining these functions together can lead to ugly code. Consider the last
+example of the previous section; <a href="../libraries/pl.seq.html#">seq</a> is repeated three times and the resulting
+expression has to be read right-to-left. The first issue can be helped by local
+aliases, so that the expression becomes <code>copy(filter(last(s),&apos;&lt;&apos;))</code> but the
+second issue refers to the somewhat unnatural order of functional application.
+We tend to prefer reading operations from left to right, which is one reason why
+object-oriented notation has become popular. Sequence adapters allow this
+expression to be written like so:</p>
+
+
+<pre>
+seq(s):last():filter(<span class="string">'&lt;'</span>):copy()
+</pre>
+
+<p>With this notation, the operation becomes a chain of method calls running from
+left to right.</p>
+
+<p>'Sequence' is not a basic Lua type, they are generally functions or callable
+objects. The expression <code>seq(s)</code> wraps a sequence in a <em>sequence wrapper</em>, which
+is an object which understands all the functions in <a href="../libraries/pl.seq.html#">pl.seq</a> as methods. This
+object then explicitly represents sequences.</p>
+
+<p>As a special case, the  constructor (which is when you call the table <a href="../libraries/pl.seq.html#">seq</a>) will
+make a wrapper for a plain list-like table. Here we apply the length operator to
+a sequence of strings, and print them out.</p>
+
+
+<pre>
+&gt; seq{<span class="string">'one'</span>,<span class="string">'tw'</span>,<span class="string">'t'</span>} :map <span class="string">'#'</span> :printall()
+<span class="number">3</span> <span class="number">2</span> <span class="number">1</span>
+</pre>
+
+<p>As a convenience, there is a function <a href="../libraries/pl.seq.html#lines">seq.lines</a> which behaves just like
+<a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.lines">io.lines</a> except it wraps the result as an explicit sequence type. This takes
+the first 10 lines from standard input, makes it uppercase, turns it into a
+sequence with a count and the value, glues these together with the concatenation
+operator, and finally prints out the sequence delimited by a newline.</p>
+
+
+<pre>
+seq.lines():take(<span class="number">10</span>):upper():enum():map(<span class="string">'..'</span>):printall <span class="string">'\n'</span>
+</pre>
+
+<p>Note the method <code>upper</code>, which is not a <a href="../libraries/pl.seq.html#">seq</a> function. if an unknown method is
+called, sequence wrappers apply that method to all the values in the sequence
+(this is implicit use of <a href="../libraries/pl.seq.html#mapmethod">mapmethod</a>)</p>
+
+<p>It is straightforward to create custom sequences that can be used in this way. On
+Unix, <code>/dev/random</code> gives you an <em>endless</em> sequence of random bytes, so we use
+<a href="../libraries/pl.seq.html#take">take</a> to limit the sequence, and then <a href="../libraries/pl.seq.html#map">map</a> to scale the result into the desired
+range. The key step is to use <a href="../libraries/pl.seq.html#">seq</a> to wrap the iterator function:</p>
+
+
+<pre>
+<span class="comment">-- random.lua
+</span><span class="keyword">local</span> seq = <span class="global">require</span> <span class="string">'pl.seq'</span>
+
+<span class="keyword">function</span> dev_random()
+    <span class="keyword">local</span> f = <span class="global">io</span>.open(<span class="string">'/dev/random'</span>)
+    <span class="keyword">local</span> byte = <span class="global">string</span>.byte
+    <span class="keyword">return</span> seq(<span class="keyword">function</span>()
+        <span class="comment">-- read two bytes into a string and convert into a 16-bit number
+</span>        <span class="keyword">local</span> s = f:read(<span class="number">2</span>)
+        <span class="keyword">return</span> byte(s,<span class="number">1</span>) + <span class="number">256</span>*byte(s,<span class="number">2</span>)
+    <span class="keyword">end</span>)
+<span class="keyword">end</span>
+
+<span class="comment">-- print 10 random numbers from 0 to 1 !
+</span>dev_random():take(<span class="number">10</span>):map(<span class="string">'%'</span>,<span class="number">100</span>):map(<span class="string">'/'</span>,<span class="number">100</span>):printall <span class="string">','</span>
+</pre>
+
+<p>Another Linux one-liner depends on the <code>/proc</code> filesystem and makes a list of all
+the currently running processes:</p>
+
+
+<pre>
+pids = seq(lfs.dir <span class="string">'/proc'</span>):filter(stringx.isdigit):map(<span class="global">tonumber</span>):copy()
+</pre>
+
+<p>This version of Penlight has an experimental feature which relies on the fact
+that <em>all</em> Lua types can have metatables, including functions. This makes
+<em>implicit sequence wrapping</em> possible:</p>
+
+
+<pre>
+&gt; seq.import()
+&gt; seq.random(<span class="number">5</span>):printall(<span class="string">','</span>,<span class="number">5</span>,<span class="string">'%4.1f'</span>)
+ <span class="number">0.0</span>, <span class="number">0.1</span>, <span class="number">0.4</span>, <span class="number">0.1</span>, <span class="number">0.2</span>
+</pre>
+
+<p>This avoids the awkward <code>seq(seq.random(5))</code> construction. Or the iterator can
+come from somewhere else completely:</p>
+
+
+<pre>
+&gt; (<span class="string">'one two three'</span>):gfind(<span class="string">'%a+'</span>):printall(<span class="string">','</span>)
+one,two,three,
+</pre>
+
+<p>After <code>seq.import</code>, it is no longer necessary to explicitly wrap sequence
+functions.</p>
+
+<p>But there is a price to pay for this convenience. <em>Every</em> function is affected,
+so that any function can be used, appropriate or not:</p>
+
+
+<pre>
+&gt; <span class="global">math</span>.sin:printall()
+..seq.lua:<span class="number">287</span>: bad argument #<span class="number">1</span> to <span class="string">'(for generator)'</span> (number expected, got <span class="keyword">nil</span>)
+&gt; a = <span class="global">tostring</span>
+&gt; = a:find(<span class="string">' '</span>)
+<span class="keyword">function</span>: <span class="number">0042</span>C920
+</pre>
+
+<p>What function is returned? It's almost certain to be something that makes no
+sense in the current context. So implicit sequences may make certain kinds of
+programming mistakes harder to catch - they are best used for interactive
+exploration and small scripts.</p>
+
+<p><a id="comprehensions"/></p>
+
+<p><a name="List_Comprehensions"></a></p>
+<h3>List Comprehensions</h3>
+
+<p>List comprehensions are a compact way to create tables by specifying their
+elements. In Python, you can say this:</p>
+
+
+<pre>
+ls = [x <span class="keyword">for</span> x <span class="keyword">in</span> range(<span class="number">5</span>)]  # == [<span class="number">0</span>,<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>]
+</pre>
+
+<p>In Lua, using <a href="../libraries/pl.comprehension.html#">pl.comprehension</a>:</p>
+
+
+<pre>
+&gt; C = <span class="global">require</span>(<span class="string">'pl.comprehension'</span>).new()
+&gt; = C (<span class="string">'x for x=1,10'</span>) ()
+{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span>,<span class="number">8</span>,<span class="number">9</span>,<span class="number">10</span>}
+</pre>
+
+<p><code>C</code> is a function which compiles a list comprehension <em>string</em> into a <em>function</em>.
+In this case, the function has no arguments. The parentheses are redundant for a
+function taking a string argument, so this works as well:</p>
+
+
+<pre>
+&gt; = C <span class="string">'x^2 for x=1,4'</span> ()
+{<span class="number">1</span>,<span class="number">4</span>,<span class="number">9</span>,<span class="number">16</span>}
+&gt; = C <span class="string">'{x,x^2} for x=1,4'</span> ()
+{{<span class="number">1</span>,<span class="number">1</span>},{<span class="number">2</span>,<span class="number">4</span>},{<span class="number">3</span>,<span class="number">9</span>},{<span class="number">4</span>,<span class="number">16</span>}}
+</pre>
+
+<p>Note that the expression can be <em>any</em> function of the variable <code>x</code>!</p>
+
+<p>The basic syntax so far is <code>&lt;expr&gt; for &lt;set&gt;</code>, where <code>&lt;set&gt;</code> can be anything that
+the Lua <code>for</code> statement understands. <code>&lt;set&gt;</code> can also just be the variable, in
+which case the values will come from the <em>argument</em> of the comprehension. Here
+I'm emphasizing that a comprehension is a function which can take a list argument:</p>
+
+
+<pre>
+&gt; = C <span class="string">'2*x for x'</span> {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}
+{<span class="number">2</span>,<span class="number">4</span>,<span class="number">6</span>}
+&gt; dbl = C <span class="string">'2*x for x'</span>
+&gt; = dbl {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+{<span class="number">20</span>,<span class="number">40</span>,<span class="number">60</span>}
+</pre>
+
+<p>Here is a somewhat more explicit way of saying the same thing; <code>_1</code> is a
+<em>placeholder</em> refering to the <em>first</em> argument passed to the comprehension.</p>
+
+
+<pre>
+&gt; = C <span class="string">'2*x for _,x in pairs(_1)'</span> {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>}
+{<span class="number">20</span>,<span class="number">40</span>,<span class="number">60</span>}
+&gt; = C <span class="string">'_1(x) for x'</span>(<span class="global">tostring</span>,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{<span class="string">'1'</span>,<span class="string">'2'</span>,<span class="string">'3'</span>,<span class="string">'4'</span>}
+</pre>
+
+<p>This extended syntax is useful when you wish to collect the result of some
+iterator, such as <a href="https://www.lua.org/manual/5.1/manual.html#pdf-io.lines">io.lines</a>. This comprehension creates a function which creates
+a table of all the lines in a file:</p>
+
+
+<pre>
+&gt; f = <span class="global">io</span>.open(<span class="string">'array.lua'</span>)
+&gt; lines = C <span class="string">'line for line in _1:lines()'</span> (f)
+&gt; = #lines
+<span class="number">118</span>
+</pre>
+
+<p>There are a number of functions that may be applied to the result of a
+comprehension:</p>
+
+
+<pre>
+&gt; = C <span class="string">'min(x for x)'</span> {<span class="number">1</span>,<span class="number">44</span>,<span class="number">0</span>}
+<span class="number">0</span>
+&gt; = C <span class="string">'max(x for x)'</span> {<span class="number">1</span>,<span class="number">44</span>,<span class="number">0</span>}
+<span class="number">44</span>
+&gt; = C <span class="string">'sum(x for x)'</span> {<span class="number">1</span>,<span class="number">44</span>,<span class="number">0</span>}
+<span class="number">45</span>
+</pre>
+
+<p>(These are equivalent to a reduce operation on a list.)</p>
+
+<p>After the <code>for</code> part, there may be a condition, which filters the output. This
+comprehension collects the even numbers from a list:</p>
+
+
+<pre>
+&gt; = C <span class="string">'x for x if x % 2 == 0'</span> {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>}
+{<span class="number">2</span>,<span class="number">4</span>}
+</pre>
+
+<p>There may be a number of <code>for</code> parts:</p>
+
+
+<pre>
+&gt; = C <span class="string">'{x,y} for x = 1,2 for y = 1,2'</span> ()
+{{<span class="number">1</span>,<span class="number">1</span>},{<span class="number">1</span>,<span class="number">2</span>},{<span class="number">2</span>,<span class="number">1</span>},{<span class="number">2</span>,<span class="number">2</span>}}
+&gt; = C <span class="string">'{x,y} for x for y'</span> ({<span class="number">1</span>,<span class="number">2</span>},{<span class="number">10</span>,<span class="number">20</span>})
+{{<span class="number">1</span>,<span class="number">10</span>},{<span class="number">1</span>,<span class="number">20</span>},{<span class="number">2</span>,<span class="number">10</span>},{<span class="number">2</span>,<span class="number">20</span>}}
+</pre>
+
+<p>These comprehensions are useful when dealing with functions of more than one
+variable, and are not so easily achieved with the other Penlight functional forms.</p>
+
+<p><a id="func"/></p>
+
+<p><a name="Creating_Functions_from_Functions"></a></p>
+<h3>Creating Functions from Functions</h3>
+
+
+<p>Lua functions may be treated like any other value, although of course you cannot
+multiply or add them. One operation that makes sense is <em>function composition</em>,
+which chains function calls (so <code>(f * g)(x)</code> is <code>f(g(x))</code>.)</p>
+
+
+<pre>
+&gt; func = <span class="global">require</span> <span class="string">'pl.func'</span>
+&gt; printf = func.compose(<span class="global">io</span>.write,<span class="global">string</span>.format)
+&gt; printf(<span class="string">"hello %s\n"</span>,<span class="string">'world'</span>)
+hello world
+<span class="keyword">true</span>
+</pre>
+
+<p>Many functions require you to pass a function as an argument, say to apply to all
+values of a sequence or as a callback. Often useful functions have the wrong
+number of arguments. So there is a need to construct a function of one argument
+from one of two arguments, <em>binding</em> the extra argument to a given value.</p>
+
+<p><em>partial application</em> takes a function of n arguments and returns a function of n-1
+arguments where the first argument is bound to some value:</p>
+
+
+<pre>
+&gt; p2 = func.bind1(<span class="global">print</span>,<span class="string">'start&gt;'</span>)
+&gt; p2(<span class="string">'hello'</span>,<span class="number">2</span>)
+start&gt;  hello   <span class="number">2</span>
+&gt; ops = <span class="global">require</span> <span class="string">'pl.operator'</span>
+&gt; = tablex.filter({<span class="number">1</span>,-<span class="number">2</span>,<span class="number">10</span>,-<span class="number">1</span>,<span class="number">2</span>},bind1(ops.gt,<span class="number">0</span>))
+{-<span class="number">2</span>,-<span class="number">1</span>}
+&gt; tablex.filter({<span class="number">1</span>,-<span class="number">2</span>,<span class="number">10</span>,-<span class="number">1</span>,<span class="number">2</span>},bind1(ops.le,<span class="number">0</span>))
+{<span class="number">1</span>,<span class="number">10</span>,<span class="number">2</span>}
+</pre>
+
+<p>The last example unfortunately reads backwards, because <a href="../libraries/pl.func.html#bind1">bind1</a> alway binds the
+first argument!  Also unfortunately, in my youth I confused 'currying' with
+'partial application', so the old name for <a href="../libraries/pl.func.html#bind1">bind1</a> is <code>curry</code> - this alias still exists.</p>
+
+<p>This is a specialized form of function argument binding. Here is another way
+to say the <a href="https://www.lua.org/manual/5.1/manual.html#pdf-print">print</a> example:</p>
+
+
+<pre>
+&gt; p2 = func.bind(<span class="global">print</span>,<span class="string">'start&gt;'</span>,func._1,func._2)
+&gt; p2(<span class="string">'hello'</span>,<span class="number">2</span>)
+start&gt;  hello   <span class="number">2</span>
+</pre>
+
+<p>where <code>_1</code> and <code>_2</code> are <em>placeholder variables</em>, corresponding to the first and
+second argument respectively.</p>
+
+<p>Having <a href="../libraries/pl.func.html#">func</a> all over the place is distracting, so it's useful to pull all of
+<a href="../libraries/pl.func.html#">pl.func</a> into the local context. Here is the filter example, this time the right
+way around:</p>
+
+
+<pre>
+&gt; utils.import <span class="string">'pl.func'</span>
+&gt; tablex.filter({<span class="number">1</span>,-<span class="number">2</span>,<span class="number">10</span>,-<span class="number">1</span>,<span class="number">2</span>},bind(ops.gt, _1, <span class="number">0</span>))
+{<span class="number">1</span>,<span class="number">10</span>,<span class="number">2</span>}
+</pre>
+
+<p><a href="../libraries/pl.tablex.html#merge">tablex.merge</a> does a general merge of two tables. This example shows the
+usefulness of binding the last argument of a function.</p>
+
+
+<pre>
+&gt; S1 = {john=<span class="number">27</span>, jane=<span class="number">31</span>, mary=<span class="number">24</span>}
+&gt; S2 = {jane=<span class="number">31</span>, jones=<span class="number">50</span>}
+&gt; intersection = bind(tablex.merge, _1, _2, <span class="keyword">false</span>)
+&gt; union = bind(tablex.merge, _1, _2, <span class="keyword">true</span>)
+&gt; = intersection(S1,S2)
+{jane=<span class="number">31</span>}
+&gt; = union(S1,S2)
+{mary=<span class="number">24</span>,jane=<span class="number">31</span>,john=<span class="number">27</span>,jones=<span class="number">50</span>}
+</pre>
+
+<p>When using <a href="../libraries/pl.func.html#bind">bind</a> with <a href="https://www.lua.org/manual/5.1/manual.html#pdf-print">print</a>, we got a function of precisely two arguments,
+whereas we really want our function to use varargs like <a href="https://www.lua.org/manual/5.1/manual.html#pdf-print">print</a>. This is the role
+of <code>_0</code>:</p>
+
+
+<pre>
+&gt; _DEBUG = <span class="keyword">true</span>
+&gt; p = bind(<span class="global">print</span>,<span class="string">'start&gt;'</span>, _0)
+<span class="keyword">return</span> <span class="keyword">function</span> (fn,_v1)
+    <span class="keyword">return</span> <span class="keyword">function</span>(...) <span class="keyword">return</span> fn(_v1,...) <span class="keyword">end</span>
+<span class="keyword">end</span>
+
+&gt; p(<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>)
+start&gt;  <span class="number">1</span>       <span class="number">2</span>       <span class="number">3</span>       <span class="number">4</span>       <span class="number">5</span>
+</pre>
+
+<p>I've turned on the global <code>_DEBUG</code> flag, so that the function generated is
+printed out. It is actually a function which <em>generates</em> the required function;
+the first call <em>binds the value</em> of <code>_v1</code> to 'start>'.</p>
+
+<p><a name="Placeholder_Expressions"></a></p>
+<h3>Placeholder Expressions</h3>
+
+<p>A common pattern in Penlight is a function which applies another function to all
+elements in a table or a sequence, such as <a href="../libraries/pl.tablex.html#map">tablex.map</a> or <a href="../libraries/pl.seq.html#filter">seq.filter</a>. Lua does
+anonymous functions well, although they can be a bit tedious to type:</p>
+
+
+<pre>
+&gt; = tablex.map(<span class="keyword">function</span>(x) <span class="keyword">return</span> x*x <span class="keyword">end</span>, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{<span class="number">1</span>,<span class="number">4</span>,<span class="number">9</span>,<span class="number">16</span>}
+</pre>
+
+<p><a href="../libraries/pl.func.html#">pl.func</a> allows you to define <em>placeholder expressions</em>, which can cut down on
+the typing required, and also make your intent clearer. First, we bring contents
+of <a href="../libraries/pl.func.html#">pl.func</a> into our context, and then supply an expression using placeholder
+variables, such as <code>_1</code>,<code>_2</code>,etc. (C++ programmers will recognize this from the
+Boost libraries.)</p>
+
+
+<pre>
+&gt; utils.import <span class="string">'pl.func'</span>
+&gt; = tablex.map(_1*_1, {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{<span class="number">1</span>,<span class="number">4</span>,<span class="number">9</span>,<span class="number">16</span>}
+</pre>
+
+<p>Functions of up to 5 arguments can be generated.</p>
+
+
+<pre>
+&gt; = tablex.map2(_1+_2,{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>}, {<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>})
+{<span class="number">11</span>,<span class="number">22</span>,<span class="number">33</span>}
+</pre>
+
+<p>These expressions can use arbitrary functions, altho they must first be
+registered with the functional library. <a href="../libraries/pl.func.html#register">func.register</a> brings in a single
+function, and <a href="../libraries/pl.func.html#import">func.import</a> brings in a whole table of functions, such as <a href="https://www.lua.org/manual/5.1/manual.html#5.6">math</a>.</p>
+
+
+<pre>
+&gt; sin = register(<span class="global">math</span>.sin)
+&gt; = tablex.map(sin(_1), {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{<span class="number">0.8414709848079</span>,<span class="number">0.90929742682568</span>,<span class="number">0.14112000805987</span>,-<span class="number">0.75680249530793</span>}
+&gt; import <span class="string">'math'</span>
+&gt; = tablex.map(cos(<span class="number">2</span>*_1),{<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>})
+{-<span class="number">0.41614683654714</span>,-<span class="number">0.65364362086361</span>,<span class="number">0.96017028665037</span>,-<span class="number">0.14550003380861</span>}
+</pre>
+
+<p>A common operation is calling a method of a set of objects:</p>
+
+
+<pre>
+&gt; = tablex.map(_1:sub(<span class="number">1</span>,<span class="number">1</span>), {<span class="string">'one'</span>,<span class="string">'four'</span>,<span class="string">'x'</span>})
+{<span class="string">'o'</span>,<span class="string">'f'</span>,<span class="string">'x'</span>}
+</pre>
+
+<p>There are some restrictions on what operators can be used in PEs. For instance,
+because the <code>__len</code> metamethod cannot be overriden by plain Lua tables, we need
+to define a special function to express `#_1':</p>
+
+
+<pre>
+&gt; = tablex.map(Len(_1), {<span class="string">'one'</span>,<span class="string">'four'</span>,<span class="string">'x'</span>})
+{<span class="number">3</span>,<span class="number">4</span>,<span class="number">1</span>}
+</pre>
+
+<p>Likewise for comparison operators, which cannot be overloaded for <em>different</em>
+types, and thus also have to be expressed as a special function:</p>
+
+
+<pre>
+&gt; = tablex.filter(Gt(_1,<span class="number">0</span>), {<span class="number">1</span>,-<span class="number">1</span>,<span class="number">2</span>,<span class="number">4</span>,-<span class="number">3</span>})
+{<span class="number">1</span>,<span class="number">2</span>,<span class="number">4</span>}
+</pre>
+
+<p>It is useful to express the fact that a function returns multiple values. For
+instance, <a href="../libraries/pl.tablex.html#pairmap">tablex.pairmap</a>  expects a function that will be called with the key
+and the value, and returns the new value and the key, in that order.</p>
+
+
+<pre>
+&gt; = pairmap(Args(_2,_1:upper()),{fred=<span class="number">1</span>,alice=<span class="number">2</span>})
+{ALICE=<span class="number">2</span>,FRED=<span class="number">1</span>}
+</pre>
+
+<p>PEs cannot contain <code>nil</code> values, since PE function arguments are represented as
+an array. Instead, a special value called <code>Nil</code> is provided.  So say
+<code>_1:f(Nil,1)</code> instead of <code>_1:f(nil,1)</code>.</p>
+
+<p>A placeholder expression cannot be automatically used as a Lua function. The
+technical reason is that the call operator must be overloaded to construct
+function calls like <code>_1(1)</code>.  If you want to force a PE to return a function, use
+<a href="../libraries/pl.func.html#I">func.I</a>.</p>
+
+
+<pre>
+&gt; = tablex.map(_1(<span class="number">10</span>),{I(<span class="number">2</span>*_1),I(_1*_1),I(_1+<span class="number">2</span>)})
+{<span class="number">20</span>,<span class="number">100</span>,<span class="number">12</span>}
+</pre>
+
+<p>Here we make a table of functions taking a single argument, and then call them
+all with a value of 10.</p>
+
+<p>The essential idea with PEs is to 'quote' an expression so that it is not
+immediately evaluated, but instead turned into a function that can be applied
+later to some arguments. The basic mechanism is to wrap values and placeholders
+so that the usual Lua operators have the effect of building up an <em>expression
+tree</em>. (It turns out that you can do <em>symbolic algebra</em> using PEs, see
+<a href="../examples/symbols.lua.html#">symbols.lua</a> in the examples directory, and its test runner <code>testsym.lua</code>, which
+demonstrates symbolic differentiation.)</p>
+
+<p>The rule is that if any operator has a PE operand, the result will be quoted.
+Sometimes we need to quote things explicitly. For instance, say we want to pass a
+function to a filter that must return true if the element value is in a set.
+<code>set[_1]</code> is the obvious expression, but it does not give the desired result,
+since it evaluates directly, giving <code>nil</code>. Indexing works differently than a
+binary operation like addition (set+_1 <em>is</em> properly quoted) so there is a need
+for an explicit quoting or wrapping operation. This is the job of the <code>_</code>
+function; the PE in this case should be <code>_(set)[_1]</code>.  This works for functions
+as well, as a convenient alternative to registering functions: <code>_(math.sin)(_1)</code>.
+This is equivalent to using the `lines' method:</p>
+
+
+<pre>
+<span class="keyword">for</span> line <span class="keyword">in</span> I(_(f):read()) <span class="keyword">do</span> <span class="global">print</span>(line) <span class="keyword">end</span>
+</pre>
+
+<p>Now this will work for <em>any</em> 'file-like' object which which has a <code>read</code> method
+returning the next line. If you had a LuaSocket client which was being 'pushed'
+by lines sent from a server, then <code>_(s):receive &apos;*l&apos;</code> would create an iterator
+for accepting input. These forms can be convenient for adapting your data flow so
+that it can be passed to the sequence functions in `pl.seq'.</p>
+
+<p>Placeholder expressions can be mixed with sequence wrapper expressions.
+<a href="../libraries/pl.lexer.html#lua">lexer.lua</a> will give us a double-valued sequence of tokens, where the first
+value is a type, and the second is a value. We filter out only the values where
+the type is 'iden', extract the actual value using <code>map</code>, get the unique values
+and finally copy to a list.</p>
+
+
+<pre>
+&gt; str = <span class="string">'for i=1,10 do for j = 1,10 do print(i,j) end end'</span>
+&gt; = seq(lexer.lua(str)):filter(<span class="string">'=='</span>,<span class="string">'iden'</span>):map(_2):unique():copy()
+{i,<span class="global">print</span>,j}
+</pre>
+
+<p>This is a particularly intense line (and I don't always suggest making everything
+a one-liner!); the key is the behaviour of <code>map</code>, which will take both values of
+the sequence, so <code>_2</code> returns the value part. (Since <code>filter</code> here takes extra
+arguments, it only operates on the type values.)</p>
+
+<p>There are some performance considerations to using placeholder expressions.
+Instantiating a PE requires constructing and compiling a function, which is not
+such a fast operation. So to get best performance, factor out PEs from loops like
+this;</p>
+
+
+<pre>
+<span class="keyword">local</span> fn = I(_1:f() + _2:g())
+<span class="keyword">for</span> i = <span class="number">1</span>,n <span class="keyword">do</span>
+    res[i] = tablex.map2(fn,first[i],second[i])
+<span class="keyword">end</span>
+</pre>
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/08-additional.md.html b/Data/Libraries/Penlight/docs/manual/08-additional.md.html
new file mode 100644
index 0000000..d13ac6e
--- /dev/null
+++ b/Data/Libraries/Penlight/docs/manual/08-additional.md.html
@@ -0,0 +1,815 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Simple_Input_Patterns">Simple Input Patterns </a></li>
+<li><a href="#Command_line_Programs_with_Lapp">Command-line Programs with Lapp </a></li>
+<li><a href="#Simple_Test_Framework">Simple Test Framework </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><strong>Additional Libraries</strong></li>
+  <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Additional Libraries</h2>
+
+<p>Libraries in this section are no longer considered to be part of the Penlight
+core, but still provide specialized functionality when needed.</p>
+
+<p><a id="sip"/></p>
+
+<p><a name="Simple_Input_Patterns"></a></p>
+<h3>Simple Input Patterns</h3>
+
+<p>Lua string pattern matching is very powerful, and usually you will not need a
+traditional regular expression library.  Even so, sometimes Lua code ends up
+looking like Perl, which happens because string patterns are not always the
+easiest things to read, especially for the casual reader.  Here is a program
+which needs to understand three distinct date formats:</p>
+
+
+<pre>
+<span class="comment">-- parsing dates using Lua string patterns
+</span>months={Jan=<span class="number">1</span>,Feb=<span class="number">2</span>,Mar=<span class="number">3</span>,Apr=<span class="number">4</span>,May=<span class="number">5</span>,Jun=<span class="number">6</span>,
+Jul=<span class="number">7</span>,Aug=<span class="number">8</span>,Sep=<span class="number">9</span>,Oct=<span class="number">10</span>,Nov=<span class="number">11</span>,Dec=<span class="number">12</span>}
+
+<span class="keyword">function</span> check_and_process(d,m,y)
+    d = <span class="global">tonumber</span>(d)
+    m = <span class="global">tonumber</span>(m)
+    y = <span class="global">tonumber</span>(y)
+    ....
+<span class="keyword">end</span>
+
+<span class="keyword">for</span> line <span class="keyword">in</span> f:lines() <span class="keyword">do</span>
+    <span class="comment">-- ordinary (English) date format
+</span>    <span class="keyword">local</span> d,m,y = line:match(<span class="string">'(%d+)/(%d+)/(%d+)'</span>)
+    <span class="keyword">if</span> d <span class="keyword">then</span>
+        check_and_process(d,m,y)
+    <span class="keyword">else</span> <span class="comment">-- ISO date??
+</span>        y,m,d = line:match(<span class="string">'(%d+)%-(%d+)%-(%d+)'</span>)
+        <span class="keyword">if</span> y <span class="keyword">then</span>
+            check_and_process(d,m,y)
+        <span class="keyword">else</span> <span class="comment">-- &lt;day&gt; &lt;month-name&gt; &lt;year&gt;?
+</span>            d,mm,y = line:match(<span class="string">'%(d+)%s+(%a+)%s+(%d+)'</span>)
+            m = months[mm]
+            check_and_process(d,m,y)
+        <span class="keyword">end</span>
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>These aren't particularly difficult patterns, but already typical issues are
+appearing, such as having to escape '-'. Also, <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.match">string.match</a> returns its
+captures, so that we're forced to use a slightly awkward nested if-statement.</p>
+
+<p>Verification issues will further cloud the picture, since regular expression
+people try to enforce constraints (like year cannot be more than four digits)
+using regular expressions, on the usual grounds that you shouldn't stop using a
+hammer when you are enjoying yourself.</p>
+
+<p><a href="../libraries/pl.sip.html#">pl.sip</a> provides a simple, intuitive way to detect patterns in strings and
+extract relevant parts.</p>
+
+
+<pre>
+&gt; sip = <span class="global">require</span> <span class="string">'pl.sip'</span>
+&gt; dump = <span class="global">require</span>(<span class="string">'pl.pretty'</span>).dump
+&gt; res = {}
+&gt; c = sip.compile <span class="string">'ref=$S{file}:$d{line}'</span>
+&gt; = c(<span class="string">'ref=hello.c:10'</span>,res)
+<span class="keyword">true</span>
+&gt; dump(res)
+{
+  line = <span class="number">10</span>,
+  file = <span class="string">"hello.c"</span>
+}
+&gt; = c(<span class="string">'ref=long name, no line'</span>,res)
+<span class="keyword">false</span>
+</pre>
+
+<p><a href="../libraries/pl.sip.html#compile">sip.compile</a> creates a pattern matcher function, which takes a string and a
+table as arguments. If the string matches the pattern, then <code>true</code> is returned
+and the table is populated according to the captures within the pattern.</p>
+
+<p>Here is another version of the date parser:</p>
+
+
+<pre>
+<span class="comment">-- using SIP patterns
+</span><span class="keyword">function</span> check(t)
+    check_and_process(t.day,t.month,t.year)
+<span class="keyword">end</span>
+
+shortdate = sip.compile(<span class="string">'$d{day}/$d{month}/$d{year}'</span>)
+longdate = sip.compile(<span class="string">'$d{day} $v{mon} $d{year}'</span>)
+isodate = sip.compile(<span class="string">'$d{year}-$d{month}-$d{day}'</span>)
+
+<span class="keyword">for</span> line <span class="keyword">in</span> f:lines() <span class="keyword">do</span>
+    <span class="keyword">local</span> res = {}
+    <span class="keyword">if</span> shortdate(str,res) <span class="keyword">then</span>
+        check(res)
+    <span class="keyword">elseif</span> isodate(str,res) <span class="keyword">then</span>
+        check(res)
+    <span class="keyword">elseif</span> longdate(str,res) <span class="keyword">then</span>
+        res.month = months[res.mon]
+        check(res)
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>SIP captures start with '$', then a one-character type, and then an
+optional variable name in curly braces.</p>
+
+
+<pre>
+Type      Meaning
+v         identifier
+i         possibly signed integer
+f         floating-point number
+r         rest of line
+q         quoted <span class="global">string</span> (quoted using either ' <span class="keyword">or</span> ")
+p         a path name
+(         anything inside balanced parentheses
+[         anything inside balanced brackets
+{         anything inside balanced curly brackets
+&lt;         anything inside balanced angle brackets
+</pre>
+
+<p>If a type is not one of the above, then it's assumed to be one of the standard
+Lua character classes, and will match one or more repetitions of that class.
+Any spaces you leave in your pattern will match any number of spaces, including
+zero, unless the spaces are between two identifier characters or patterns
+matching them; in that case, at least one space will be matched.</p>
+
+<p>SIP captures (like <code>$v{mon}</code>) do not have to be named. You can use just <code>$v</code>, but
+you have to be consistent; if a pattern contains unnamed captures, then all
+captures must be unnamed. In this case, the result table is a simple list of
+values.</p>
+
+<p><a href="../libraries/pl.sip.html#match">sip.match</a> is a useful shortcut if you want to compile and match in one call,
+without saving the compiled pattern. It caches the result, so it is not much
+slower than explicitly using <a href="../libraries/pl.sip.html#compile">sip.compile</a>.</p>
+
+
+<pre>
+&gt; sip.match(<span class="string">'($q{first},$q{second})'</span>,<span class="string">'("john","smith")'</span>,res)
+<span class="keyword">true</span>
+&gt; res
+{second=<span class="string">'smith'</span>,first=<span class="string">'john'</span>}
+&gt; res = {}
+&gt; sip.match(<span class="string">'($q,$q)'</span>,<span class="string">'("jan","smit")'</span>,res)  <span class="comment">-- unnamed captures
+</span><span class="keyword">true</span>
+&gt; res
+{<span class="string">'jan'</span>,<span class="string">'smit'</span>}
+&gt; sip.match(<span class="string">'($q,$q)'</span>,<span class="string">'("jan", "smit")'</span>,res)
+<span class="keyword">false</span>   <span class="comment">---&gt; oops! Can't handle extra space!
+</span>&gt; sip.match(<span class="string">'( $q , $q )'</span>,<span class="string">'("jan", "smit")'</span>,res)
+<span class="keyword">true</span>
+</pre>
+
+<p>As a general rule, allow for whitespace in your patterns.</p>
+
+<p>Finally, putting a '$' at the end of a pattern means 'capture the rest of the
+line, starting at the first non-space'. It is a shortcut for '$r{rest}',
+or just '$r' if no named captures are used.</p>
+
+
+<pre>
+&gt; sip.match(<span class="string">'( $q , $q ) $'</span>,<span class="string">'("jan", "smit") and a string'</span>,res)
+<span class="keyword">true</span>
+&gt; res
+{<span class="string">'jan'</span>,<span class="string">'smit'</span>,<span class="string">'and a string'</span>}
+&gt; res = {}
+&gt; sip.match(<span class="string">'( $q{first} , $q{last} ) $'</span>,<span class="string">'("jan", "smit") and a string'</span>,res)
+<span class="keyword">true</span>
+&gt; res
+{first=<span class="string">'jan'</span>,rest=<span class="string">'and a string'</span>,last=<span class="string">'smit'</span>}
+</pre>
+
+<p><a id="lapp"/></p>
+
+<p><a name="Command_line_Programs_with_Lapp"></a></p>
+<h3>Command-line Programs with Lapp</h3>
+
+<p><a href="../libraries/pl.lapp.html#">pl.lapp</a> is a small and focused Lua module which aims to make standard
+command-line parsing easier and intuitive. It implements the standard GNU style,
+i.e. short flags with one letter start with '-', and there may be an additional
+long flag which starts with '--'. Generally options which take an argument expect
+to find it as the next parameter (e.g. 'gcc test.c -o test') but single short
+options taking a value can dispense with the space (e.g. 'head -n4
+test.c' or <code>gcc -I/usr/include/lua/5.1 ...</code>)</p>
+
+<p>As far as possible, Lapp will convert parameters into their equivalent Lua types,
+i.e. convert numbers and convert filenames into file objects. If any conversion
+fails, or a required parameter is missing, an error will be issued and the usage
+text will be written out. So there are two necessary tasks, supplying the flag
+and option names and associating them with a type.</p>
+
+<p>For any non-trivial script, even for personal consumption, it's necessary to
+supply usage text. The novelty of Lapp is that it starts from that point and
+defines a loose format for usage strings which can specify the names and types of
+the parameters.</p>
+
+<p>An example will make this clearer:</p>
+
+
+<pre>
+<span class="comment">-- scale.lua
+</span>  lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+  <span class="keyword">local</span> args = lapp <span class="string">[[
+  Does some calculations
+    -o,--offset (default 0.0)  Offset to add to scaled number
+    -s,--scale  (number)  Scaling factor
+    &lt;number&gt; (number)  Number to be scaled
+  ]]</span>
+
+  <span class="global">print</span>(args.offset + args.scale * args.number)
+</pre>
+
+<p>Here is a command-line session using this script:</p>
+
+
+<pre>
+$ lua scale.lua
+scale.lua:missing required parameter: scale
+
+Does some calculations
+ -o,<span class="comment">--offset (default 0.0)  Offset to add to scaled number
+</span> -s,<span class="comment">--scale  (number)  Scaling factor
+</span>  &lt;number&gt; (number )  Number to be scaled
+
+$ lua scale.lua -s <span class="number">2.2</span> <span class="number">10</span>
+<span class="number">22</span>
+
+$ lua scale.lua -s <span class="number">2.2</span> x10
+scale.lua:unable to convert to number: x10
+
+....(usage as before)
+</pre>
+
+<p>There are two kinds of lines in Lapp usage strings which are meaningful; option
+and parameter lines. An option line gives the short option, optionally followed
+by the corresponding long option. A type specifier in parentheses may follow.
+Similarly, a parameter line starts with '<NAME>', followed by a type
+specifier.</p>
+
+<p>Type specifiers usually start with a type name: one of 'boolean', 'string','number','file-in' or
+'file-out'.  You may leave this out, but then <em>must</em> say 'default' followed by a value.
+If a flag or parameter has a default, it is not <em>required</em> and is set to the default. The actual
+type is deduced from this value (number, string, file or boolean) if not provided directly.
+'Deduce' is a fancy word for 'guess' and it can be wrong, e.g '(default 1)'
+will always be a number. You can say '(string default 1)' to override the guess.
+There are file values for the predefined console streams: stdin, stdout, stderr.</p>
+
+<p>The boolean type is the default for flags. Not providing the type specifier is equivalent to
+'(boolean default false)`.  If the flag is meant to be 'turned off' then either the full
+'(boolean default true)` or the shortcut '(default true)' will work.</p>
+
+<p>An alternative to <code>default</code> is <code>optional</code>:</p>
+
+
+<pre>
+<span class="keyword">local</span> lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+<span class="keyword">local</span> args = lapp <span class="string">[[
+   --cmd (optional string) Command to run.
+]]</span>
+
+<span class="keyword">if</span> args.cmd <span class="keyword">then</span>
+  <span class="global">os</span>.execute(args.cmd)
+<span class="keyword">end</span>
+</pre>
+
+<p>Here we're implying that <code>cmd</code> need not be specified (just as with <code>default</code>) but if not
+present, then <code>args.cmd</code> is <code>nil</code>, which will always test false.</p>
+
+<p>The rest of the line is ignored and can be used for explanatory text.</p>
+
+<p>This script shows the relation between the specified parameter names and the
+fields in the output table.</p>
+
+
+<pre>
+<span class="comment">-- simple.lua
+</span><span class="keyword">local</span> args = <span class="global">require</span> (<span class="string">'pl.lapp'</span>) <span class="string">[[
+Various flags and option types
+  -p          A simple optional flag, defaults to false
+  -q,--quiet  A simple flag with long name
+  -o  (string)  A required option with argument
+  -s  (default 'save') Optional string with default 'save' (single quotes ignored)
+  -n  (default 1) Optional numerical flag with default 1
+  -b  (string default 1)  Optional string flag with default '1' (type explicit)
+  &lt;input&gt; (default stdin)  Optional input file parameter, reads from stdin
+]]</span>
+
+<span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(args) <span class="keyword">do</span>
+    <span class="global">print</span>(k,v)
+<span class="keyword">end</span>
+</pre>
+
+<p>I've just dumped out all values of the args table; note that args.quiet has
+become true, because it's specified; args.p defaults to false. If there is a long
+name for an option, that will be used in preference as a field name. A type or
+default specifier is not necessary for simple flags, since the default type is
+boolean.</p>
+
+
+<pre>
+$ simple -o test -q simple.lua
+p       <span class="keyword">false</span>
+input   file (<span class="number">781</span>C1BD8)
+quiet   <span class="keyword">true</span>
+o       test
+input_name      simple.lua
+D:\dev\lua\lapp&gt;simple -o test simple.lua one two three
+<span class="number">1</span>       one
+<span class="number">2</span>       two
+<span class="number">3</span>       three
+p       <span class="keyword">false</span>
+quiet   <span class="keyword">false</span>
+input   file (<span class="number">781</span>C1BD8)
+o       test
+input_name      simple.lua
+</pre>
+
+<p>The parameter input has been set to an open read-only file object - we know it
+must be a read-only file since that is the type of the default value. The field
+input_name is automatically generated, since it's often useful to have access to
+the original filename.</p>
+
+<p>Notice that any extra parameters supplied will be put in the result table with
+integer indices, i.e. args[i] where i goes from 1 to #args.</p>
+
+<p>Files don't really have to be closed explicitly for short scripts with a quick
+well-defined mission, since the result of garbage-collecting file objects is to
+close them.</p>
+
+<h4>Enforcing a Range and Enumerations</h4>
+
+<p>The type specifier can also be of the form '(' MIN '..' MAX ')' or a set of strings
+separated by '|'.</p>
+
+
+<pre>
+<span class="keyword">local</span> lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+<span class="keyword">local</span> args = lapp <span class="string">[[
+    Setting ranges
+    &lt;x&gt; (1..10)  A number from 1 to 10
+    &lt;y&gt; (-5..1e6) Bigger range
+    &lt;z&gt; (slow|medium|fast)
+]]</span>
+
+<span class="global">print</span>(args.x,args.y)
+</pre>
+
+<p>Here the meaning of ranges is that the value is greater or equal to MIN and less or equal
+to MAX.
+An 'enum' is a <em>string</em> that can only have values from a specified set.</p>
+
+<h4>Custom Types</h4>
+
+<p>There is no builti-in way to force a parameter to be a whole number, but
+you may define a custom type that does this:</p>
+
+
+<pre>
+lapp = <span class="global">require</span> (<span class="string">'pl.lapp'</span>)
+
+lapp.add_type(<span class="string">'integer'</span>,<span class="string">'number'</span>,
+    <span class="keyword">function</span>(x)
+        lapp.<span class="global">assert</span>(<span class="global">math</span>.ceil(x) == x, <span class="string">'not an integer!'</span>)
+    <span class="keyword">end</span>
+)
+
+<span class="keyword">local</span> args =  lapp <span class="string">[[
+    &lt;ival&gt; (integer) Process PID
+]]</span>
+
+<span class="global">print</span>(args.ival)
+</pre>
+
+<p><a href="../libraries/pl.lapp.html#add_type">lapp.add_type</a> takes three parameters, a type name, a converter and a constraint
+function. The constraint function is expected to throw an assertion if some
+condition is not true; we use <a href="../libraries/pl.lapp.html#assert">lapp.assert</a> because it fails in the standard way
+for a command-line script. The converter argument can either be a type name known
+to Lapp, or a function which takes a string and generates a value.</p>
+
+<p>Here's a useful custom type that allows dates to be input as <a href="../classes/pl.Date.html#">pl.Date</a> values:</p>
+
+
+<pre>
+<span class="keyword">local</span> df = Date.Format()
+
+lapp.add_type(<span class="string">'date'</span>,
+    <span class="keyword">function</span>(s)
+        <span class="keyword">local</span> d,e = df:parse(s)
+        lapp.<span class="global">assert</span>(d,e)
+        <span class="keyword">return</span> d
+    <span class="keyword">end</span>
+)
+</pre>
+
+<h4>'varargs' Parameter Arrays</h4>
+
+
+<pre>
+lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+<span class="keyword">local</span> args = lapp <span class="string">[[
+Summing numbers
+    &lt;numbers...&gt; (number) A list of numbers to be summed
+]]</span>
+
+<span class="keyword">local</span> sum = <span class="number">0</span>
+<span class="keyword">for</span> i,x <span class="keyword">in</span> <span class="global">ipairs</span>(args.numbers) <span class="keyword">do</span>
+    sum = sum + x
+<span class="keyword">end</span>
+<span class="global">print</span> (<span class="string">'sum is '</span>..sum)
+</pre>
+
+<p>The parameter number has a trailing '...', which indicates that this parameter is
+a 'varargs' parameter. It must be the last parameter, and args.number will be an
+array.</p>
+
+<p>Consider this implementation of the head utility from Mac OS X:</p>
+
+
+<pre>
+<span class="comment">-- implements a BSD-style head
+</span><span class="comment">-- (see http://www.manpagez.com/man/1/head/osx-10.3.php)
+</span>
+lapp = <span class="global">require</span> (<span class="string">'pl.lapp'</span>)
+
+<span class="keyword">local</span> args = lapp <span class="string">[[
+Print the first few lines of specified files
+   -n         (default 10)    Number of lines to print
+   &lt;files...&gt; (default stdin) Files to print
+]]</span>
+
+<span class="comment">-- by default, lapp converts file arguments to an actual Lua file object.
+</span><span class="comment">-- But the actual filename is always available as &lt;file&gt;_name.
+</span><span class="comment">-- In this case, 'files' is a varargs array, so that 'files_name' is
+</span><span class="comment">-- also an array.
+</span><span class="keyword">local</span> nline = args.n
+<span class="keyword">local</span> nfile = #args.files
+<span class="keyword">for</span> i = <span class="number">1</span>,nfile <span class="keyword">do</span>
+    <span class="keyword">local</span> file = args.files[i]
+    <span class="keyword">if</span> nfile &gt; <span class="number">1</span> <span class="keyword">then</span>
+        <span class="global">print</span>(<span class="string">'==&gt; '</span>..args.files_name[i]..<span class="string">' &lt;=='</span>)
+    <span class="keyword">end</span>
+    <span class="keyword">local</span> n = <span class="number">0</span>
+    <span class="keyword">for</span> line <span class="keyword">in</span> file:lines() <span class="keyword">do</span>
+        <span class="global">print</span>(line)
+        n = n + <span class="number">1</span>
+        <span class="keyword">if</span> n == nline <span class="keyword">then</span> <span class="keyword">break</span> <span class="keyword">end</span>
+    <span class="keyword">end</span>
+<span class="keyword">end</span>
+</pre>
+
+<p>Note how we have access to all the filenames, because the auto-generated field
+<code>files_name</code> is also an array!</p>
+
+<p>(This is probably not a very considerate script, since Lapp will open all the
+files provided, and only close them at the end of the script. See the <code>xhead.lua</code>
+example for another implementation.)</p>
+
+<p>Flags and options may also be declared as vararg arrays, and can occur anywhere.
+If there is both a short and long form, then the trailing "..." must happen after the long form,
+for example "-x,--network... (string)...",</p>
+
+<p>Bear in mind that short options can be combined (like 'tar -xzf'), so it's
+perfectly legal to have '-vvv'. But normally the value of args.v is just a simple
+<code>true</code> value.</p>
+
+
+<pre>
+<span class="keyword">local</span> args = <span class="global">require</span> (<span class="string">'pl.lapp'</span>) <span class="string">[[
+   -v...  Verbosity level; can be -v, -vv or -vvv
+]]</span>
+vlevel = <span class="keyword">not</span> args.v[<span class="number">1</span>] <span class="keyword">and</span> <span class="number">0</span> <span class="keyword">or</span> #args.v
+<span class="global">print</span>(vlevel)
+</pre>
+
+<p>The vlevel assigment is a bit of Lua voodoo, so consider the cases:</p>
+
+
+<pre>
+* No -v flag, v is just { <span class="keyword">false</span> }
+* One -v flags, v is { <span class="keyword">true</span> }
+* Two -v flags, v is { <span class="keyword">true</span>, <span class="keyword">true</span> }
+* Three -v flags, v is { <span class="keyword">true</span>, <span class="keyword">true</span>, <span class="keyword">true</span> }
+</pre>
+
+<h4>Defining a Parameter Callback</h4>
+
+<p>If a script implements <code>lapp.callback</code>, then Lapp will call it after each
+argument is parsed. The callback is passed the parameter name, the raw unparsed
+value, and the result table. It is called immediately after assignment of the
+value, so the corresponding field is available.</p>
+
+
+<pre>
+lapp = <span class="global">require</span> (<span class="string">'pl.lapp'</span>)
+
+<span class="keyword">function</span> lapp.callback(parm,arg,args)
+    <span class="global">print</span>(<span class="string">'+'</span>,parm,arg)
+<span class="keyword">end</span>
+
+<span class="keyword">local</span> args = lapp <span class="string">[[
+Testing parameter handling
+    -p               Plain flag (defaults to false)
+    -q,--quiet       Plain flag with GNU-style optional long name
+    -o  (string)     Required string option
+    -n  (number)     Required number option
+    -s (default 1.0) Option that takes a number, but will default
+    &lt;start&gt; (number) Required number argument
+    &lt;input&gt; (default stdin)  A parameter which is an input file
+    &lt;output&gt; (default stdout) One that is an output file
+]]</span>
+<span class="global">print</span> <span class="string">'args'</span>
+<span class="keyword">for</span> k,v <span class="keyword">in</span> <span class="global">pairs</span>(args) <span class="keyword">do</span>
+    <span class="global">print</span>(k,v)
+<span class="keyword">end</span>
+</pre>
+
+<p>This produces the following output:</p>
+
+
+<pre>
+$ args -o name -n <span class="number">2</span> <span class="number">10</span> args.lua
++       o       name
++       n       <span class="number">2</span>
++       start   <span class="number">10</span>
++       input   args.lua
+args
+p       <span class="keyword">false</span>
+s       <span class="number">1</span>
+input_name      args.lua
+quiet   <span class="keyword">false</span>
+output  file (<span class="number">781</span>C1B98)
+start   <span class="number">10</span>
+input   file (<span class="number">781</span>C1BD8)
+o       name
+n       <span class="number">2</span>
+</pre>
+
+<p>Callbacks are needed when you want to take action immediately on parsing an
+argument.</p>
+
+<h4>Slack Mode</h4>
+
+<p>If you'd like to use a multi-letter 'short' parameter you need to set
+the <code>lapp.slack</code> variable to <code>true</code>.</p>
+
+<p>In the following example we also see how default <code>false</code> and default <code>true</code> flags can be used
+and how to overwrite the default <code>-h</code> help flag (<code>--help</code> still works fine) - this applies
+to non-slack mode as well.</p>
+
+
+<pre>
+<span class="comment">-- Parsing the command line ----------------------------------------------------
+</span><span class="comment">-- test.lua
+</span><span class="keyword">local</span> lapp = <span class="global">require</span> <span class="string">'pl.lapp'</span>
+<span class="keyword">local</span> pretty = <span class="global">require</span> <span class="string">'pl.pretty'</span>
+lapp.slack = <span class="keyword">true</span>
+<span class="keyword">local</span> args = lapp <span class="string">[[
+Does some calculations
+   -v, --video              (string)             Specify input video
+   -w, --width              (default 256)        Width of the video
+   -h, --height             (default 144)        Height of the video
+   -t, --time               (default 10)         Seconds of video to process
+   -sk,--seek               (default 0)          Seek number of seconds
+   -f1,--flag1                                   A false flag
+   -f2,--flag2                                   A false flag
+   -f3,--flag3              (default true)       A true flag
+   -f4,--flag4              (default true)       A true flag
+]]</span>
+
+pretty.dump(args)
+</pre>
+
+<p>And here we can see the output of <code>test.lua</code>:</p>
+
+
+<pre>
+$&gt; lua test.lua -v abc <span class="comment">--time 40 -h 20 -sk 15 --flag1 -f3
+</span><span class="comment">----&gt;
+</span>{
+  width = <span class="number">256</span>,
+  flag1 = <span class="keyword">true</span>,
+  flag3 = <span class="keyword">false</span>,
+  seek = <span class="number">15</span>,
+  flag2 = <span class="keyword">false</span>,
+  video = abc,
+  time = <span class="number">40</span>,
+  height = <span class="number">20</span>,
+  flag4 = <span class="keyword">true</span>
+}
+</pre>
+
+<p><a name="Simple_Test_Framework"></a></p>
+<h3>Simple Test Framework</h3>
+
+<p><a href="../libraries/pl.test.html#">pl.test</a> was originally developed for the sole purpose of testing Penlight itself,
+but you may find it useful for your own applications. (<a href="http://lua-users.org/wiki/UnitTesting">There are many other options</a>.)</p>
+
+<p>Most of the goodness is in <a href="../libraries/pl.test.html#asserteq">test.asserteq</a>.  It uses <a href="../libraries/pl.tablex.html#deepcompare">tablex.deepcompare</a> on its two arguments,
+and by default quits the test application with a non-zero exit code, and an informative
+message printed to stderr:</p>
+
+
+<pre>
+<span class="keyword">local</span> test = <span class="global">require</span> <span class="string">'pl.test'</span>
+
+test.asserteq({<span class="number">10</span>,<span class="number">20</span>,<span class="number">30</span>},{<span class="number">10</span>,<span class="number">20</span>,<span class="number">30.1</span>})
+
+<span class="comment">--~ test-test.lua:3: assertion failed
+</span><span class="comment">--~ got:    {
+</span><span class="comment">--~  [1] = 10,
+</span><span class="comment">--~  [2] = 20,
+</span><span class="comment">--~  [3] = 30
+</span><span class="comment">--~ }
+</span><span class="comment">--~ needed:    {
+</span><span class="comment">--~  [1] = 10,
+</span><span class="comment">--~  [2] = 20,
+</span><span class="comment">--~  [3] = 30.1
+</span><span class="comment">--~ }
+</span><span class="comment">--~ these values were not equal</span>
+</pre>
+
+<p>This covers most cases but it's also useful to compare strings using <a href="https://www.lua.org/manual/5.1/manual.html#pdf-string.match">string.match</a></p>
+
+
+<pre>
+<span class="comment">-- must start with bonzo the dog
+</span>test.assertmatch (<span class="string">'bonzo the dog is here'</span>,<span class="string">'^bonzo the dog'</span>)
+<span class="comment">-- must end with an integer
+</span>test.assertmatch (<span class="string">'hello 42'</span>,<span class="string">'%d+$'</span>)
+</pre>
+
+<p>Since Lua errors are usually strings, this matching strategy is used to test 'exceptions':</p>
+
+
+<pre>
+test.assertraise(<span class="keyword">function</span>()
+    <span class="keyword">local</span> t = <span class="keyword">nil</span>
+    <span class="global">print</span>(t.bonzo)
+<span class="keyword">end</span>,<span class="string">'nil value'</span>)
+</pre>
+
+<p>(Some care is needed to match the essential part of the thrown error if you care
+for portability, since in Lua 5.2
+the exact error is "attempt to index local 't' (a nil value)" and in Lua 5.3 the error
+is "attempt to index a nil value (local 't')")</p>
+
+<p>There is an extra optional argument to these test functions, which is helpful when writing
+test helper functions. There you want to highlight the failed line, not the actual call
+to <code>asserteq</code> or <code>assertmatch</code> - line 33 here is the call to <code>is_iden</code></p>
+
+
+<pre>
+<span class="keyword">function</span> is_iden(str)
+    test.assertmatch(str,<span class="string">'^[%a_][%w_]*$'</span>,<span class="number">1</span>)
+<span class="keyword">end</span>
+
+is_iden <span class="string">'alpha_dog'</span>
+is_iden <span class="string">'$dollars'</span>
+
+<span class="comment">--~ test-test.lua:33: assertion failed
+</span><span class="comment">--~ got:    "$dollars"
+</span><span class="comment">--~ needed:    "^[%a_][%w_]*$"
+</span><span class="comment">--~ these strings did not match</span>
+</pre>
+
+<p>Useful Lua functions often return multiple values, and <a href="../libraries/pl.test.html#tuple">test.tuple</a> is a convenient way to
+capture these values, whether they contain nils or not.</p>
+
+
+<pre>
+T = test.tuple
+
+<span class="comment">--- common error pattern
+</span><span class="keyword">function</span> failing()
+    <span class="keyword">return</span> <span class="keyword">nil</span>,<span class="string">'failed'</span>
+<span class="keyword">end</span>
+
+test.asserteq(T(failing()),T(<span class="keyword">nil</span>,<span class="string">'failed'</span>))
+</pre>
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
diff --git a/Data/Libraries/Penlight/docs/manual/09-discussion.md.html b/Data/Libraries/Penlight/docs/manual/09-discussion.md.html
new file mode 100644
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<head>
+    <title>Penlight Documentation</title>
+    <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" />
+</head>
+<body>
+
+<div id="container">
+
+<div id="product">
+	<div id="product_logo"></div>
+	<div id="product_name"><big><b></b></big></div>
+	<div id="product_description"></div>
+</div> <!-- id="product" -->
+
+
+<div id="main">
+
+
+<!-- Menu -->
+
+<div id="navigation">
+<br/>
+<h1>Penlight</h1>
+
+<ul>
+  <li><a href="https://github.com/lunarmodules/Penlight">GitHub Project</a></li>
+  <li><a href="../index.html">Documentation</a></li>
+</ul>
+
+<h2>Contents</h2>
+<ul>
+<li><a href="#Modularity_and_Granularity">Modularity and Granularity </a></li>
+<li><a href="#Defining_what_is_Callable">Defining what is Callable </a></li>
+</ul>
+
+
+<h2>Manual</h2>
+<ul class="nowrap">
+  <li><a href="../manual/01-introduction.md.html">Introduction</a></li>
+  <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li>
+  <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li>
+  <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li>
+  <li><a href="../manual/05-dates.md.html">Date and Time</a></li>
+  <li><a href="../manual/06-data.md.html">Data</a></li>
+  <li><a href="../manual/07-functional.md.html">Functional Programming</a></li>
+  <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li>
+  <li><strong>Technical Choices</strong></li>
+</ul>
+<h2>Libraries</h2>
+<ul class="nowrap">
+  <li><a href="../libraries/pl.html">pl</a></li>
+  <li><a href="../libraries/pl.app.html">pl.app</a></li>
+  <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li>
+  <li><a href="../libraries/pl.class.html">pl.class</a></li>
+  <li><a href="../libraries/pl.compat.html">pl.compat</a></li>
+  <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li>
+  <li><a href="../libraries/pl.config.html">pl.config</a></li>
+  <li><a href="../libraries/pl.data.html">pl.data</a></li>
+  <li><a href="../libraries/pl.dir.html">pl.dir</a></li>
+  <li><a href="../libraries/pl.file.html">pl.file</a></li>
+  <li><a href="../libraries/pl.func.html">pl.func</a></li>
+  <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li>
+  <li><a href="../libraries/pl.input.html">pl.input</a></li>
+  <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li>
+  <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li>
+  <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li>
+  <li><a href="../libraries/pl.operator.html">pl.operator</a></li>
+  <li><a href="../libraries/pl.path.html">pl.path</a></li>
+  <li><a href="../libraries/pl.permute.html">pl.permute</a></li>
+  <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li>
+  <li><a href="../libraries/pl.seq.html">pl.seq</a></li>
+  <li><a href="../libraries/pl.sip.html">pl.sip</a></li>
+  <li><a href="../libraries/pl.strict.html">pl.strict</a></li>
+  <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li>
+  <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li>
+  <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li>
+  <li><a href="../libraries/pl.template.html">pl.template</a></li>
+  <li><a href="../libraries/pl.test.html">pl.test</a></li>
+  <li><a href="../libraries/pl.text.html">pl.text</a></li>
+  <li><a href="../libraries/pl.types.html">pl.types</a></li>
+  <li><a href="../libraries/pl.url.html">pl.url</a></li>
+  <li><a href="../libraries/pl.utils.html">pl.utils</a></li>
+  <li><a href="../libraries/pl.xml.html">pl.xml</a></li>
+</ul>
+<h2>Classes</h2>
+<ul class="nowrap">
+  <li><a href="../classes/pl.Date.html">pl.Date</a></li>
+  <li><a href="../classes/pl.List.html">pl.List</a></li>
+  <li><a href="../classes/pl.Map.html">pl.Map</a></li>
+  <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li>
+  <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li>
+  <li><a href="../classes/pl.Set.html">pl.Set</a></li>
+</ul>
+<h2>Examples</h2>
+<ul class="nowrap">
+  <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
+  <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li>
+  <li><a href="../examples/symbols.lua.html">symbols.lua</a></li>
+  <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li>
+  <li><a href="../examples/test-data.lua.html">test-data.lua</a></li>
+  <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li>
+  <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li>
+  <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li>
+  <li><a href="../examples/testclone.lua.html">testclone.lua</a></li>
+  <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li>
+  <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li>
+  <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li>
+  <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li>
+  <li><a href="../examples/testxml.lua.html">testxml.lua</a></li>
+  <li><a href="../examples/which.lua.html">which.lua</a></li>
+</ul>
+
+</div>
+
+<div id="content">
+
+
+<h2>Technical Choices</h2>
+
+<p><a name="Modularity_and_Granularity"></a></p>
+<h3>Modularity and Granularity</h3>
+
+<p>In an ideal world, a program should only load the libraries it needs. Penlight is
+intended to work in situations where an extra 100Kb of bytecode could be a
+problem. It is straightforward but tedious to load exactly what you need:</p>
+
+
+<pre>
+<span class="keyword">local</span> data = <span class="global">require</span> <span class="string">'pl.data'</span>
+<span class="keyword">local</span> List = <span class="global">require</span> <span class="string">'pl.List'</span>
+<span class="keyword">local</span> array2d = <span class="global">require</span> <span class="string">'pl.array2d'</span>
+<span class="keyword">local</span> seq = <span class="global">require</span> <span class="string">'pl.seq'</span>
+<span class="keyword">local</span> utils = <span class="global">require</span> <span class="string">'pl.utils'</span>
+</pre>
+
+<p>This is the style that I follow in Penlight itself, so that modules don't mess
+with the global environment; also, <code>stringx.import()</code> is not used because it will
+update the global <a href="https://www.lua.org/manual/5.1/manual.html#5.4">string</a> table.</p>
+
+<p>But <code>require &apos;pl&apos;</code> is more convenient in scripts; the question is how to ensure
+that one doesn't load the whole kitchen sink as the price of convenience. The
+strategy is to only load modules when they are referenced. In 'init.lua' (which
+is loaded by <code>require &apos;pl&apos;</code>) a metatable is attached to the global table with an
+<code>__index</code> metamethod. Any unknown name is looked up in the list of modules, and
+if found, we require it and make that module globally available. So when
+<a href="../libraries/pl.tablex.html#deepcompare">tablex.deepcompare</a> is encountered, looking up <a href="../libraries/pl.tablex.html#">tablex</a> causes 'pl.tablex' to be
+required.  .</p>
+
+<p>Modifying the behaviour of the global table has consequences. For instance, there
+is the famous module <a href="../libraries/pl.strict.html#">strict</a> which comes with Lua itself (perhaps the only
+standard Lua module written in Lua itself) which also does this modification so
+that global variiables must be defined before use.  So the implementation in
+'init.lua' allows for a 'not found' hook, which 'pl.strict.lua' uses.  Other
+libraries may install their own metatables for <code>_G</code>, but Penlight will now
+forward any unknown name to the <code>__index</code> defined by the original metatable.</p>
+
+<p>But the strategy is worth the effort: the old 'kitchen sink' 'init.lua' would
+pull in about 260K of bytecode, whereas now typical programs use about 100K less,
+and short scripts even better - for instance, if they were only needing
+functionality in <a href="../libraries/pl.utils.html#">utils</a>.</p>
+
+<p>There are some functions which mark their output table with a special metatable,
+when it seems particularly appropriate. For instance, <a href="../libraries/pl.tablex.html#makeset">tablex.makeset</a> creates a
+<a href="../classes/pl.Set.html#">Set</a>, and <a href="../libraries/pl.seq.html#copy">seq.copy</a> creates a <a href="../classes/pl.List.html#">List</a>. But this does not automatically result in
+the loading of <a href="../classes/pl.Set.html#">pl.Set</a> and <a href="../classes/pl.List.html#">pl.List</a>; only if you try to access any of these
+methods.  In 'utils.lua', there is an exported table called <code>stdmt</code>:</p>
+
+
+<pre>
+stdmt = { List = {}, Map = {}, Set = {}, MultiMap = {} }
+</pre>
+
+<p>If you go through 'init.lua', then these plain little 'identity' tables get an
+<code>__index</code> metamethod which forces the loading of the full functionality. Here is
+the code from 'list.lua' which starts the ball rolling for lists:</p>
+
+
+<pre>
+List = utils.stdmt.List
+List.__index = List
+List._name = <span class="string">"List"</span>
+List._class = List
+</pre>
+
+<p>The 'load-on-demand' strategy helps to modularize the library.  Especially for
+more casual use, <code>require &apos;pl&apos;</code> is a good compromise between convenience and
+modularity.</p>
+
+<p>In this current version, I have generally reduced the amount of trickery
+involved. Previously, <a href="../classes/pl.Map.html#">Map</a> was defined in <a href="../libraries/pl.class.html#">pl.class</a>; now it is sensibly defined
+in <a href="../classes/pl.Map.html#">pl.Map</a>; <a href="../libraries/pl.class.html#">pl.class</a> only contains the basic class mechanism (and returns that
+function.) For consistency, <a href="../classes/pl.List.html#">List</a> is returned directly by  <code>require &apos;pl.List&apos;</code>
+(note the uppercase 'L'),  Also, the amount of module dependencies in the
+non-core libraries like <a href="../libraries/pl.config.html#">pl.config</a> have been reduced.</p>
+
+<p><a name="Defining_what_is_Callable"></a></p>
+<h3>Defining what is Callable</h3>
+
+<p>'utils.lua' exports <code>function_arg</code> which is used extensively throughout Penlight.
+It defines what is meant by 'callable'.  Obviously true functions are immediately
+passed back. But what about strings? The first option is that it represents an
+operator in 'operator.lua', so that '&lt;' is just an alias for <a href="../libraries/pl.operator.html#lt">operator.lt</a>.</p>
+
+<p>We then check whether there is a <em>function factory</em> defined for the metatable of
+the value.</p>
+
+<p>(It is true that strings can be made callable, but in practice this turns out to
+be a cute but dubious idea, since <em>all</em> strings share the same metatable. A
+common programming error is to pass the wrong kind of object to a function, and
+it's better to get a nice clean 'attempting to call a string' message rather than
+some obscure trace from the bowels of your library.)</p>
+
+<p>The other module that registers a function factory is <a href="../libraries/pl.func.html#">pl.func</a>. Placeholder
+expressions cannot be directly calleable, and so need to be instantiated and
+cached in as efficient way as possible.</p>
+
+<p>(An inconsistency is that <code>utils.is_callable</code> does not do this thorough check.)</p>
+
+
+
+
+</div> <!-- id="content" -->
+</div> <!-- id="main" -->
+<div id="about">
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.6</a></i>
+</div> <!-- id="about" -->
+</div> <!-- id="container" -->
+</body>
+</html>
author	chai <chaifix@163.com>	2021-10-30 11:32:16 +0800
committer	chai <chaifix@163.com>	2021-10-30 11:32:16 +0800
commit	42ec7286b2d36a9ba22925f816a17cb1cc2aa5ce (patch)
tree	24bc7009457a8d7500f264e89946dc20d069294f /Data/Libraries/Penlight/docs
parent	164885fd98d48703bd771f802d79557b7db97431 (diff)