anchor.diff:  <p>Now to modify the layout to work with this new content region. In
   “_layout.html.erb” replace the code:</p>
   
  -<pre>&lt;h1&gt;&lt;%= @title %&gt;/h1&gt;
  +<pre>&lt;h1&gt;&lt;%= @title %&gt;&lt;/h1&gt;
   &lt;%= yield %&gt;</pre>
   
   <p>With the following:</p>
   
   <pre>&lt;div id="content"&gt;
  -  &lt;h1&gt;&lt;%= @title %&gt;/h1&gt;
  +  &lt;h1&gt;&lt;%= @title %&gt;&lt;/h1&gt;
     &lt;%= yield %&gt;
   &lt;/div&gt;
   &lt;div id="sidebar"&gt;
  
positive.code:   &lt;/head&gt;
    &lt;body&gt;
      &lt;div id="content"&gt;
        &lt;h1&gt;&lt;%= @title %&gt;/h1&gt;
        &lt;%= yield %&gt;
      &lt;/div&gt;
      &lt;div id="sidebar"&gt;
  
negative.code:   &lt;body&gt;
      &lt;%= render 'header' %&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;
  