Subject: Why doesn't merge fail if message has only sign-off?

From: Kaartic Sivaraam <[email-masked]>
Date: Sun, 02 Jul 2017 17:33:08 +0530

While trying to merge a branch using "git merge" if a merge
message consists only of a "Sign-off" line it doesn't fail.
To be consistent with the behaviour of "git commit" shouldn't the merge
fail?

-- 
Kaartic