[RFC PATCH 1/2] Allow "git log --grep foo" as synonym for "git log --grep=foo".

@@ -1148,6 +1148,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 			       int *unkc, const char **unkv)
 {
 	const char *arg = argv[0];
+	const char *optarg = argv[1];
 
 	/* pseudo revision arguments */
 	if (!strcmp(arg, "--all") || !strcmp(arg, "--branches") ||

@@ -1374,6 +1375,9 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		add_header_grep(revs, GREP_HEADER_COMMITTER, arg+12);
 	} else if (!prefixcmp(arg, "--grep=")) {
 		add_message_grep(revs, arg+7);
+	} else if (!strcmp(arg, "--grep")) {
+		add_message_grep(revs, optarg);
+		return 2;
 	} else if (!strcmp(arg, "--extended-regexp") || !strcmp(arg, "-E")) {
 		revs->grep_filter.regflags |= REG_EXTENDED;
 	} else if (!strcmp(arg, "--regexp-ignore-case") || !strcmp(arg, "-i")) {