;;;
(defun message-send-and-exit (&optional arg)
- "Send message like `message-send', then, if no errors, exit from mail buffer."
+ "Send message like `message-send', then, if no errors, exit from mail buffer.
+The usage of ARG is defined by the instance that called Message.
+It should typically alter the sending method in some way or other."
(interactive "P")
(let ((buf (current-buffer))
(actions message-exit-actions))