In a program, optional non-nil second argument NO-ERROR-IF-NO-MESSAGE
means return nil instead of signaling an error if message does not
-exist\; in this case, the cursor is positioned near where the message
+exist; in this case, the cursor is positioned near where the message
would have been. Non-nil third argument DONT-SHOW means not to show
the message."
(interactive "NGo to message: ")