anchor.diff:  
                   div.buttons
                       a( href=github ) github
  -                    a( href="#" ) docs
  +                    a( href="docs.html" ) docs
  
positive.code: 
      body
          #wrapper
              header
                  h1
                      a( href=homepage )
                          span kouto swiss
                  h2= description
                  div.buttons
                      a( href=github ) github
                      a( href="#" ) docs
  
              section.about
                  blockquote
  
negative.code:         meta( charset="UTF-8" )/
          title kouto swiss - A complete CSS framework for Stylus
  
          meta( name="viewport", content="width=device-width, initial-scale=1.0, minimum-scale=1.0, minimal-ui" )/
  
          link( rel="stylesheet", href="styles/styles.css" )/
  
  