anchor.diff:  </head>
   <body>
   
  -<nav class="navbar-wrapper navbar-inverse navbar-fixed-top" role="navigation">
  +<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
     <div class="container">
       <div class="navbar-header">
         <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
  
positive.code: 
  <script src="//code.jquery.com/jquery-2.2.4.min.js" integrity="sha384-rY/jv8mMhqDabXSo+UCggqKtdmBfd3qC2/KvyTDNQ6PcUJXaxK1tMepoQda4g5vB" crossorigin="anonymous"></script>
  <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
  <%= javascript_include_tag "//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/highlight.min.js" %>
  <%= content_for(:javascripts) -%>
  <script>hljs.initHighlightingOnLoad();</script>
  </body>
  
negative.code:     table.not-wide { width: auto; }
      table code { color: black; background-color: inherit; padding: 0; }
      table.table-condensed tbody tr td:first-child { padding-left: 0; }
      a[href*="github.com"] { white-space: nowrap; }
      a[href*="github.com"]:after { font-family: FontAwesome; content: "\f09b";  display: inline-block;  color: initial;  padding-left: 3px; }
      details :focus { outline: none; }
  