title: Emacs New File Confirmation during Find-File Completion
body: <p>Some Emacs package I use has turned <em>off</em> the find-file confirmation for choosing a new non-existing file that matches parts of existing file-names shown during completion. I want this confirmation back to the default. What customization option regulates this behaviour?</p>
  
  <p>Example:</p>
  
  <ul>
  <li><code>M-x</code> <code>find-file</code></li>
  <li>Enter letter <code>a</code></li>
  <li>Pressing <code>TAB</code> now gives two candidates: <code>a1</code> and <code>a2</code></li>
  <li>Just pressing <code>Return</code> <strong><em>should now query me to confirm through an extra</em></strong> <code>Return</code>. Indicated by a <code>[Confirm]</code> at the end of the minibuffer.</li>
  </ul>