* lisp/vc/diff-mode.el (diff-apply-buffer): Interactively, operate on an active region. Reverse-apply hunks with a prefix argument, like C-u C-c C-a already does.
* lisp/vc/diff-mode.el (diff-apply-buffer): Interactively, operate on an active region. Reverse-apply hunks with a prefix argument, like C-u C-c C-a already does.