revert/cherry-pick: handle single quote in author name.

The same fix as aa66c7ec77 is
needed here.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-revert.sh

@@ -93,6 +93,7 @@ revert)
 cherry-pick)
 	pick_author_script='
 	/^author /{
+		s/'\''/'\''\\'\'\''/g
 		h
 		s/^author \([^<]*\) <[^>]*> .*$/\1/
 		s/'\''/'\''\'\'\''/g