anchor.diff:        content: " (unapproved)"
       }
     </style>
  -  <script>
  -    // Loads stylesheet when viewing file locally.
  -    if (location.protocol === "file:") {
  -      var link = document.querySelector('head link')
  -        , href = link.href.replace(/file/, "http");
  -
  -      link.href = href;
  -    }
  -  </script>
   </head>
   <body>
   <div class="container">
  
positive.code: <html>
  <head>
    <link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.1.1/css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
      body {
        margin: 50px;
  
negative.code:   </div>
  </div>
  </body>
  </html>