anchor.diff:                  <p class="author">Doe, John</p>
                   <p class="availability">Adelaide</p>
                 </li>
  -            </ul>-->
  +            </ul>
  +      -->
   
         <div class="list">
   
  
positive.code:   <head>
      <title>EXAMPLE RESOURCE</title>
      <meta http-equiv="Content-type" content="text/html; charset=UTF-8">
      <meta name="description" content="Example Resource">
  
      <link rel="stylesheet" type="text/css" href="css/reset.css" />
  
  
negative.code:       <input type="button" class="sort" data-sort="author" value="Sort by author"/>
        <input type="button" class="sort" data-sort="availability" value="Sort by availability"/>
  
        <!--
        <ul class="list">
                <li>
                  <h3 class="title">Test Title 1</h3>
                  <p class="author">Gray, Walter</p>
  