notes, remote: show unknown subcommands between `'

Update the "unknown subcommand" error message in 'git notes' and 'git
remote' to wrap the offending argument between `', to make it
consistent with the "unknown switch/option/subcommand" error messages
in parse-options.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/notes.c

@@ -1017,7 +1017,7 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
 			     PARSE_OPT_SUBCOMMAND_OPTIONAL);
 	if (!fn) {
 		if (argc) {
-			error(_("unknown subcommand: %s"), argv[0]);
+			error(_("unknown subcommand: `%s'"), argv[0]);
 			usage_with_options(git_notes_usage, options);
 		}
 		fn = list;

builtin/remote.c

@@ -1769,7 +1769,7 @@ int cmd_remote(int argc, const char **argv, const char *prefix)
 		return !!fn(argc, argv, prefix);
 	} else {
 		if (argc) {
-			error(_("unknown subcommand: %s"), argv[0]);
+			error(_("unknown subcommand: `%s'"), argv[0]);
 			usage_with_options(builtin_remote_usage, options);
 		}
 		return !!show_all();