anchor.diff:        li Not Turing Complete
         li Not inherently safe
   
  -  +slide(
  -    data-background="images/slim.png", data-state="screenshot",
  -    data-background-transition="slide")
  -
     +slide
       h2 Structured (Internal DSL)
       ul
  
positive.code: 
    +slide
      h2 Structured (Whitespace Significant)
      div.left(style='float:left;width:48%')
          ul
            li Ruby
              ul
                li HAML
                li Slim
      div.right(style='float:right;width:48%')
        ul
          li JavaScript
            ul
  
negative.code:         li Python
            ul
              li PyJade
  
    +slide(
      data-background="images/slim.png", data-state="screenshot",
      data-background-transition="slide")
  
    +slide
      h2 Structured (Whitespace Significant)
      ul
        li Potentially suited to Pythonistas
          ul
  