Some Emacs package I use has turned off 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?
Example:
M-x find-fileaTAB now gives two candidates: a1 and a2Return should now query me to confirm through an extra Return. Indicated by a [Confirm] at the end of the minibuffer.check the value of the variable confirm-nonexistent-file-or-buffer