title: Declaration in .git/info/exclude not not excludes from staging
body: <p>I have <code>tst.prop</code> file in my project directory and I don't want commit it to repository. I have placed line <code>*.prop</code> in <code>.git/info/exclude</code>. When I type <code>git status</code> command I still have line:</p>
  
  <pre><code>modified: tst.prop 
  </code></pre>
  
  <p>Why it is still there? How to solve this problem?</p>