Support definition lists (finally!)

[LesML] / TESTING / 📤 / links

<?xml version="1.0"?>
<div xmlns="http://www.w3.org/1999/xhtml"><article lang="en" xml:lang="en"><div class="body"><!-- Keep these links in one paragraph as it is important for testing how they interrelate:--><p><a href="http://example.com">Here is &lt;&lt;&lt; a <em>very good</em>@en$ <i>link</i>@en$ </a>
{🔗 A {🔗 messy <a href="http://example.com">link </a>
<a href="{&#x1F517;messier"> Even </a>
<a href="http://example.com/2">   </a>
<a href="example:example"><span class="important"> This</span> works now </a>
{🔗 Not a link &gt;}</p></div></article></div>