anchor.diff:  
     +slide
       h2 Structured (Whitespace Significant)
  +    div.right(style='float:right;width:48%')
  +      ul
  +        li Ruby
  +          ul
  +            li HAML
  +            li Slim
       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
  
positive.code:       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
  
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
  