title: VIM - Show the diff of last saved version and current unsaved version
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/749297/can-i-see-changes-before-i-save-my-file-in-vim">Can I see changes before I save my file in Vim?</a>  </p>
  </blockquote>
  
  
  
  <blockquote>
    <p>Duplicate: <a href="https://stackoverflow.com/questions/749297/can-i-see-changes-before-save-my-file-in-vim">Can I see changes before save my file in Vim?</a></p>
  </blockquote>
  
  <p>Is there a way to see the diff of the saved version and the edited version of the same file in VIM?</p>
  
  <p>This is the scenario: I've opened a file, editing something and I went away from the computer due to some work. After sometime I returned back and I forgot what I was editing and I would like to see the difference between the last saved and the current unsaved version of the same file. Is there a way to do it?</p>
  
  <p>Of course, I can keep undoing till the last change and start redoing to go back to my unsaved version. But what I would like to see is a diff.</p>