title: highlighting html with prism.js
body: <p>I cant seem to highlight html with prism.js because it removes the markup just printing the text. the following code inside the "pre" tag shows as just the text. I have the class for the "code" tag set to "language-markup".</p>
  
  <pre><code>    &lt;table class="data-table"&gt;
          &lt;tr&gt;
              &lt;td&gt;Title&lt;/td&gt;
              &lt;td&gt;Amount&lt;/td&gt;
          &lt;/tr&gt;
          &lt;tr&gt;
              &lt;td&gt;Shorts&lt;/td&gt;
              &lt;td&gt;£1.00&lt;/td&gt;
          &lt;/tr&gt;   
          &lt;tr&gt;
              &lt;td&gt;Shorts&lt;/td&gt;
              &lt;td&gt;£1.00&lt;/td&gt;
          &lt;/tr&gt;           
      &lt;/table&gt;
  </code></pre>
  
  <p>shows as</p>
  
  <pre><code>            Title
              Amount
  
  
              Shorts
              £1.00
  
  
              Shorts
              £1.00
  </code></pre>