title: AvoidCommentedOutCodeCheck rule bug in Sonar 4.3
body: <p>I have the following code in an xhtml file :</p>
  
  <pre><code>    &lt;span class="ui-messages-info-icon"&gt;&lt;/span&gt;&lt;br /&gt;
      &lt;!-- Le positinnement de escape="false" permet la prise en compte des balises HTML dans le message (notamment les br). --&gt;
      &lt;h:outputText value="#detailExceptionMessage" escape="false"/&gt;
  </code></pre>
  
  <p>When I run an analyse :  a new violation with the AvoidCommentedOutCodeCheck rule is raised.
  I think this violation must not appear because it is not a commented code but a comment with a piece of example code ;) !</p>
  
  <p>Is it a bug, a false-positive to flag or a bad configuration of my rule ?</p>
  
  <p>Regards,</p>
  
  <p>Stef</p>