anchor.diff:    * http://www.lesscss.org/[Less]
     * http://asciidoctor.org[Asciidoctor]
   
  -NOTE: Make sure that the Ruby gems 'tilt', 'request', and 'coderay' are installed.
  +NOTE: Make sure that the Ruby gems 'tilt' and 'coderay' are installed.
   
   == Setup
   
  
positive.code: This creates the following CSS files in directory +css+:
  
  -----
  bootstrap_cerulean.css
  bootstrap_cosmo.css
  bootstrap_cyborg.css
  bootstrap_default.css
  bootstrap_flatly.css
  bootstrap_readable.css
  bootstrap_slate.css
  bootstrap_spacelab.css
  
negative.code: This project uses the Bootstrap +.less+ sources, +variables.less+ files from Bootswatch, and additional 
  styling specific to AsciiDoc to create AsciiDoc-enhanced versions of the Bootswatch themes. The 
  AsciiDoc specific styling is based on Dan Allen's Asciidoctor SASS style sheets 
  https://github.com/asciidoctor/asciidoctor-stylesheet-factory[asciidoctor-stylesheet-factory].
  
  Rather than using Bootswatch themes, you may also create a custom theme by providing your own +variables.less+ file. 
  A good online resource for creating your own style is http://pikock.github.io/bootstrap-magic/index.html[Bootstrap Magic].
  
  You may conveniently save your +variables.less+ directly from the site.
  
  