grep: Fix a typo in a comment
grep: Fix a typo in a comment

Signed-off-by: Michał Kiedrowicz <3303283adeb04caefcc13da64be4ce1c6c137c62@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git