anchor.diff:  
   == Line Numbers
   
  -Line numbers for source code blocks can be enabled either using the `:source-linenums-option:` attribute globally for
  +Line numbers for source blocks can be enabled either using the `:source-linenums-option:` attribute globally for
   all source blocks on the page, or per source block using the `linenums` option:
   
   [listing]
  
positive.code: ----
  
  
  == Source Highlighting
  
  AsciiDoc source highlighters (e.g. CodeRay) are not supported, in favor of using the source highlighting
  
negative.code: }
  ----
  
  
  == Source Blocks from External Files (Full Content)
  
  