Use OPT_SET_INT_F() for cmdline option specification

The only thing these commands need is extra parseopt flag which can be
passed in by OPT_SET_INT_F() and it is a bit more compact than full
struct initialization.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/grep.c b/builtin/grep.c
index 6e7bc76..850bcff 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -885,9 +885,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 			   N_("indicate hit with exit status without output")),
 		OPT_BOOL(0, "all-match", &opt.all_match,
 			N_("show only matches from files that match all patterns")),
-		{ OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
-		  N_("show parse tree for grep expression"),
-		  PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
+		OPT_SET_INT_F(0, "debug", &opt.debug,
+			      N_("show parse tree for grep expression"),
+			      1, PARSE_OPT_HIDDEN),
 		OPT_GROUP(""),
 		{ OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
 			N_("pager"), N_("show matching files in the pager"),