anchor.diff:  
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  -            img(src='http://i.imgur.com/JjMUFkx.png')
  +            img(src='https://i.imgur.com/JjMUFkx.png')
               h3 Introduction to Computer Science and Programming
             p
               | This is the first class in MIT's Electrical Engineering and Computer Science major.
  
positive.code: 
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            a(href='https://archive.org/details/gd1975-06-17.aud.unknown.87560.flac16')
              img(src='http://i.imgur.com/TvfAsnh.png')
              h3 The Grateful Dead at Winterland Arena
            p Complete audio recordings of this iconic 1975 concert.
            p
  
negative.code:           | , you can play it right away. You don't have to wait for it to finish downloading.
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        article
          img.image-left(src='https://i.imgur.com/669Hknm.png')
          strong WebTorrent Desktop connects to both BitTorrent and WebTorrent peers.
          p
            | It can talk to peers running
  