(defun vc-mtn-diff (files &optional rev1 rev2 buffer)
(apply 'vc-mtn-command (or buffer "*vc-diff*") 1 files "diff"
(append (if rev1 (list "-r" rev1)) (if rev2 (list "-r" rev2)))))
(defun vc-mtn-diff (files &optional rev1 rev2 buffer)
(apply 'vc-mtn-command (or buffer "*vc-diff*") 1 files "diff"
(append (if rev1 (list "-r" rev1)) (if rev2 (list "-r" rev2)))))