anchor.diff:  
   [.output]
   ....
  -<a href="http://asciidoctor.org"><strong>Asciidoctor</strong></a> running on <a href="http://opalrb.org"><em>Opal</em></a> brings AsciiDoc to Node.js!</p>
  +<div class="paragraph">
  +<p><a href="http://asciidoctor.org"><strong>Asciidoctor</strong></a> running on <a href="http://opalrb.org"><em>Opal</em></a> brings AsciiDoc to Node.js!</p>
  +</div>
   ....
   
   ## Advanced topics
  
positive.code: var content = "http://asciidoctor.org[*Asciidoctor*] " +
      "running on http://opalrb.org[_Opal_] " +
      "brings AsciiDoc to the browser!";
  var options = Opal.hash({doctype: 'inline', attributes: ['showtitle']});
  var html = Opal.Asciidoctor.$convert(content, options); // <1>
  console.log(html); // <2>
  ```
  
  
negative.code: var content = "http://asciidoctor.org[*Asciidoctor*] " +
      "running on http://opalrb.org[_Opal_] " +
      "brings AsciiDoc to Node.js!";
  var html = processor.$convert(content); // <5>
  console.log(html); // <6>
  ```
  
  