anchor.diff:          script(src='/vendor/three.js')
           script(src='/game.js')
   
  -  p When using `block append` or `block prepend` the `block` is optional:
  +  p When using #[code block append] or #[code block prepend] the #[code block] is optional:
   
     +jade
       :jadesrc
  
positive.code:     of Jade that may be replaced within a child template, this process is recursive.
  
    p.
      Jade blocks can provide default content if desired, however optional as shown below by `block scripts`, `block content`, and `block foot`.
  
    p layout.jade
    +jade
  
negative.code:           include pet
  
    p.
      It's also possible to override a block to provide additional blocks, as shown in the following example where #[code content] now exposes a #[code sidebar] and #[code primary] block for overriding, or the child template could override #[code content] all together.
  
    p sub-layout.jade
    +jade
  