title: How to force Emacs to save even if it thinks (no changes need to be saved)
body: <p>This happens to me all the time:</p>
  
  <ul>
  <li>I have a file open in emacs,</li>
  <li>I save it ('save-buffer),</li>
  <li>the file changes on disk (or get's deleted, moved, etc.)</li>
  <li>but I want it back, so I try to save again in emacs ('save-buffer) and instead of saving it says "(no changes need to be saved)" and does nothing.</li>
  </ul>
  
  <p>Is there a different function, or a setting, that I can use to force emacs to save?</p>