anchor.diff:            | .foo address
         +div(class="__after")
           address.div
  -          | address.div
  -      +bem(false)
  -
  -    hr
  +          | .foo address.div
  +      +bem(false)
  +
  +    hr
  
positive.code:           | .foo figure
        +div(class="__after")
          figure.div
            | figure.div
        +bem(false)
  
      hr
  
negative.code:       :stylus
          .foo
            @import "../src/morph"
  
            h1
              margin 1em 20px 0.5em 0
              font-family sans-serif
              font-weight bold
              font-size 36px
              font-style italic
              line-height 40px
  
            h2
              margin 1em 20px 0.5em 0
  