lol_html 1.2.1

Streaming HTML rewriter/parser with CSS selector-based API
Documentation 
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<html><head>
  <title>Negation pseudo-class can be an argument of itself</title>
  <style type="text/css">p { background-color : red }
p:not(:not(p)) { background-color : green }</style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/">
  <link rel="help" href="https://drafts.csswg.org/selectors-4/#negation-pseudo">
  <link rel="match" href="css3-modsel-83-ref.xml">
 </head>
 <body>
<!--[ELEMENT('p')]--><p><!--[TEXT('p')]-->This paragraph should have a green background<!--[/TEXT('p')]--></p><!--[/ELEMENT('p')]-->


</body></html>