title: Twig don't accept a <p> inside a <p>
body: <p>I have just added a new <em>Twig</em> filter that give me HTML from a <em>Textile Markup</em>; so I return it <strong>raw</strong>.</p>
  
  <p>It's embedded into a html paragraph and the <em>.twig</em> file look like this:</p>
  
  <pre><code>[..]
  &lt;p class="description"&gt;
      {{ description|textile|raw }}
  &lt;/p&gt;
  [..]
  </code></pre>
  
  <p><strong>Description variable</strong> contains another paragraph:
      <p>Some text</p></p>
  
  <p>But the rendered content is this instead:</p>
  
  <pre><code>&lt;p class="description"&gt;&lt;/p&gt;
  &lt;p&gt;
    Some text
  &lt;/p&gt;
  </code></pre>
  
  <p>and the variable is rendered outside of the container, with no apparent reason.</p>
  
  <p>If I change the container to <em></em> it works perfectly</p>
  
  <pre><code>&lt;div class="description"&gt;
      &lt;p&gt;
          Some text
      &lt;/p&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Someone can give me some reason?</p>