title: Ace editor 'named entity expected got none' error
body: <p>I was using ace editor to write some code, but when wrote <code>&amp;</code> in a URL the editor gave me this error: <strong>named entity expected got none</strong>. I tried everything I knew about: changing <code>&amp;</code> to <code>&amp;amp;</code>, <code>&amp;</code> to <code>%26</code>, but nothing worked. Here's what I wrote:</p>
  <pre><code>&lt;link href=&quot;https://fonts.googleapis.com/css2?family=Xanh+Mono&amp;display=swap&quot; rel=&quot;stylesheet&quot;&gt;
  </code></pre>
  <p>Does anybody know what to do?</p>