git-send-email: abort/usage on bad option
Instead of proceeding, abort and give usage message when a bad option
is seen.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
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Instead of proceeding, abort and give usage message when a bad option
is seen.
Signed-off-by: NJunio C Hamano <junkio@cox.net>