title: doxygen default layout.xml is 25Mb. Is it normal?
body: <p>subj
  I generated it using:</p>
  
  <pre><code>doxygen -l defaultLayout.xml
  </code></pre>
  
  <p>When try to open in the Notepad++, I see
  <img src="https://i.stack.imgur.com/18nLP.png" alt="enter image description here"></p>
  
  <p>I looked in the CGAl sources. Their custom layout file is 6Kb and opens normal.</p>