anchor.diff:  
   <p>view_helpers.rb</p>
   
  -<p><strong>This tutorial is incomplete. <a href="/contributing">Help us finish it!</a></strong></p>+<p><strong>This tutorial is incomplete. <a href="/contributing">Help us finish it!</a></strong></p>
  
positive.code:     &lt;title&gt;&lt;%= @title %&gt;&lt;/title&gt;
    &lt;/head&gt;
    &lt;body&gt;
      &lt;h1&gt;&lt;%= @title %&gt;/h1&gt;
      &lt;%= yield %&gt;
    &lt;/body&gt;
  &lt;/html&gt;</pre>
  
negative.code:   &lt;/head&gt;
    &lt;body&gt;
      &lt;div id="content"&gt;
        &lt;h1&gt;&lt;%= @title %&gt;&lt;/h1&gt;
        &lt;%= yield %&gt;
      &lt;/div&gt;
      &lt;div id="sidebar"&gt;
  