anchor.diff:  }
   ----
   
  +
   Source code listing:
   
   [source,java]
  
positive.code:        int a = 1;
     }
  }
  ----
  
  <1> The main method.
  
  .Optional Title
  ==========================
  
negative.code: :toc:
  :source-highlighter: highlightjs
  :icons: font
  :experimental:
  
  = Level 1
  John Doe <john@mymail.com>
  v2.0, February 2003: Rewritten for version 2 release.
  
  
  Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam 
  nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, 
  