anchor.diff:      dt options
       dd.type.object: a(href='#options') options
       dd.description An options object, also used as the locals object
  +    dt callback
  +    dd.type.function function
  +    dd.description Node.js-style callback receiving the rendered results. #[strong This callback is called synchronously.]
     dl.returns
       dt returns
       dd.type.string string
  
positive.code:     dt options
      dd.type.object: a(href='#options') options
      dd.description An options object, also used as the locals object
    dl.returns
      dt returns
      dd.type.string string
  
negative.code:         </body>
        </html>
  
    +funcHeading('render', 'source', '[, callback]')
  
    dl.parameter-list
      dt source
  