title: how do I duplicate a regular expression
body: <p>I want to search for all the phrases that are in quotes and then duplicate them.</p>
  
  <p>In Emacs, my search looks like this:</p>
  
  <p><code>M-x replace-regexp &lt;RETURN&gt; "*" &lt;RETURN&gt; $&amp; $&amp; &lt;RETURN&gt;</code></p>
  
  <p>But it doesn't work...  </p>