anchor.diff:  
         p.
           This guide assumes familiarity with basic JavaScript and should be suitable for people new
  -        to asynchonous programming and those with some experience in either the browser on node.js
  +        to asynchronous programming and those with some experience in either the browser on node.js
   
         h2#motivation Motivation
   
  
positive.code:         })
  
        p.
          This is extremely useful if you need to run lots of operations in parallel.  The idea also extends to large un-bounded arrays of values:
  
        :js
          function readFiles(files) {
  
negative.code:       h3 Other
  
        p You can find more implementations 
          a(href='/implementations') here
  