ase note that this <code class="language-markup">&lt;pre></code> does not have the <code>line-numbers</code> class but its parent does.</p>
  <pre data-src="plugins/line-numbers/prism-line-numbers.css"></pre>

  <h2>HTML</h2>
  <p>Please note the <code>data-start="-5"</code> in the code below.</p>
  <pre class="line-numbers" data-src="plugins/line-numbers/index.html" data-start="-5"></pre>

  <h2>Unknown languages</h2>
  <pre class="language-none line-numbers"><code>This raw text
is not highlighted
but it s