anchor.diff:  
   ----
   
  -Slide Four has bullets that are revealed one after the other. This is what
  -`reveal.js` calls http://lab.hakim.se/reveal-js/#/fragments[fragments].
  -Applying the step option or role on a list (`[%step]` or `[.step]`) will do
  -the trick. Here is https://github.com/hakimel/reveal.js#fragments[upstream
  -documentation] on the topic. Note that only `fade-in` is supported for lists
  -at the moment.
  +Slide Four has bullets that are revealed one after the other.
  +This is what `reveal.js` calls http://lab.hakim.se/reveal-js/#/fragments[fragments].
  +Applying the step option or role on a list (`[%step]` or `[.step]`) will do the trick.
  +Here is https://github.com/hakimel/reveal.js#fragments[upstream documentation] on the topic.
  +Note that only `fade-in` is supported for lists at the moment.
   
   [listing]
   ....
  
positive.code: [options="header",cols="1m,1"]
  |===
  |Attribute                            |Description
  |:revealjs_theme: <theme>             | Chooses one of reveal.js'
                                          https://github.com/hakimel/reveal.js#theming[built-in themes].
                                          Default: default
  |:revealjs_customtheme: <file\|URL>   | Overrides CSS with given file or URL. Default is disabled.
  |:revealjs_controls: <true\|false>    | Display controls in the bottom right corner. Default: true
  
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
  
  