git grep: use pager

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git.c

@@ -247,7 +247,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "fsck", cmd_fsck, RUN_SETUP },
 		{ "fsck-objects", cmd_fsck, RUN_SETUP },
 		{ "get-tar-commit-id", cmd_get_tar_commit_id },
-		{ "grep", cmd_grep, RUN_SETUP },
+		{ "grep", cmd_grep, RUN_SETUP | USE_PAGER },
 		{ "help", cmd_help },
 		{ "init", cmd_init_db },
 		{ "init-db", cmd_init_db },