verify-tag: document --verbose

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/verify-tag.c

@@ -93,7 +93,7 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
 {
 	int i = 1, verbose = 0, had_error = 0;
 	const struct option verify_tag_options[] = {
-		OPT__VERBOSE(&verbose, "be verbose"),
+		OPT__VERBOSE(&verbose, "print tag contents"),
 		OPT_END()
 	};