title: How to keep 1 file from changing between branches
body: <p>I have got branch master and beta on my local computer.</p>
  
  <p>I work most of the time on beta, and when it is working fine I commit to master, but I have this <code>config.php</code> file which sets <code>debug=true</code> which I need when im working on beta.</p>
  
  <pre><code>config.php
  </code></pre>
  
  <p>Is there any way to keep this <code>config.php</code> file diferent on beta?</p>
  
  <p>And if sometime I want to change something inside I would have to do it in master so I can push to live version.</p>
  
  <p>Thanks.</p>