Add some documentation to the transform

[LesML] / TESTING / 📤 / profile-with-comment

<?xml version="1.0"?>
<div xmlns="http://www.w3.org/1999/xhtml"><!-- document comment--><!-- this is allowed following the opening shebang--><article lang="en" xml:lang="en" data-lesml-profile="about:test"><div class="body"><p>content</p></div></article></div>