anchor.diff:  Is very yellow
   ----
   
  -Slide Three applies the attribute
  -http://lab.hakim.se/reveal-js/#/14[data-background] to the `reveal.js`
  -<section> tag. Anything accepted by CSS color formats works. Here is the
  -https://github.com/hakimel/reveal.js#slide-backgrounds[upstream
  -documentation].
  +Slide Three applies the attribute http://lab.hakim.se/reveal-js/#/14[data-background] to the `reveal.js` <section> tag.
  +Anything accepted by CSS color formats works.
  +Here is the https://github.com/hakimel/reveal.js#slide-backgrounds[upstream documentation].
   
   ----
   == Slide Four
  
positive.code: == reveal.js Backend
  
  The https://github.com/asciidoctor/asciidoctor-backends/tree/master/slim/revealjs[reveal.js
  backend] is a collection of slim templates which transform an AsciiDoc
  document to HTML5 slides animated by http://lab.hakim.se/reveal-js/[reveal.js].
  
  === Installation
  
  First, you should download (or git clone) the
  https://github.com/asciidoctor/asciidoctor-backends[asciidoctor-backends]
  repository to a convenient location.
  
    git clone git://github.com/asciidoctor/asciidoctor-backends.git
  
  Then from your working directory (that is where your AsciiDoc document
  resides) you must create a +reveal.js+ directory and copy there the +reveal.js+
  file with its directories (plugin, css, ...). You could also just clone
  the [reveal.js] repository.
  
    git clone git://github.com/hakimel/reveal.js.git
  
  === Settings
  
  There are some attributes that can be set at the top of the document which
  they are specific of +revealjs+ backend.
  
  [NOTE]
  --
  
negative.code: 
  |===
  
  If you want to build a custom theme or customize an existing one you should look at `reveal.js's` documentation and use `revealjs_theme` attribute: https://github.com/hakimel/reveal.js/blob/master/css/theme/README.md
  
  === Examples
  
  