anchor.diff:  &lt;/body&gt;
   &lt;/html&gt;
         </code></pre>
  -    <p> "Boilerplate" </p>
  +
       <aside class='notes'>
         It is the underlying structure. It influences your design, but for the most part it is not visible to the users.
   
  
positive.code:     <p>This is content.</p>
      <h2>This is content.</h2>
      <p>This is <em>also</em> content.</p>
      <%= asset_tag 'assets/smiley_face.jpg' %>
    </section>
  
  
  
    <section>
      <h2> Required Structure </h2>
  
      <pre><code data-trim contenteditable>
  &lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  
negative.code:   <section>
      <h2> HTML is a <em>markup</em> language </h1>
      <h4> It tells the browser what content to display.</h4>
      <pre><code data-trim >
  &lt;p&gt;This is content.&lt;/p&gt;
  
      </code></pre>
  