title: Exporting diffs without having to commit in Mercurial
body: <p>I am using TortoiseHg GUI and it seems that there is no way to export diffs between my uncommited changes and the last revision. Is there a way to do it using hg ?</p>
  
  <p>My requirements :</p>
  
  <ul>
  <li>I do not want to commit my changes</li>
  <li>I could copy the whole directory, commit, export, delete but the directory is quite heavy</li>
  </ul>