builtin/remote: quote remote name on error to display empty name

When adding new remote name with empty string, git will print the
following error message,

  fatal: '' is not a valid remote name\n

But when removing remote name with empty string as input, git shows the
empty string without quote,

  fatal: No such remote: \n

To make these error messages consistent, quote the name of the remote
that we tried and failed to find.

Signed-off-by: Shulhan <m.shulhan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/remote.c

@@ -625,7 +625,7 @@ static int mv(int argc, const char **argv)
 
 	oldremote = remote_get(rename.old_name);
 	if (!remote_is_configured(oldremote, 1))
-		die(_("No such remote: %s"), rename.old_name);
+		die(_("No such remote: '%s'"), rename.old_name);
 
 	if (!strcmp(rename.old_name, rename.new_name) && oldremote->origin != REMOTE_CONFIG)
 		return migrate_file(oldremote);
@@ -761,7 +761,7 @@ static int rm(int argc, const char **argv)
 
 	remote = remote_get(argv[1]);
 	if (!remote_is_configured(remote, 1))
-		die(_("No such remote: %s"), argv[1]);
+		die(_("No such remote: '%s'"), argv[1]);
 
 	known_remotes.to_delete = remote;
 	for_each_remote(add_known_remote, &known_remotes);
@@ -860,7 +860,7 @@ static int get_remote_ref_states(const char *name,
 
 	states->remote = remote_get(name);
 	if (!states->remote)
-		return error(_("No such remote: %s"), name);
+		return error(_("No such remote: '%s'"), name);
 
 	read_branches();
 

t/t5505-remote.sh

@@ -145,7 +145,7 @@ test_expect_success 'remove remote protects local branches' '
 test_expect_success 'remove errors out early when deleting non-existent branch' '
 	(
 		cd test &&
-		echo "fatal: No such remote: foo" >expect &&
+		echo "fatal: No such remote: '\''foo'\''" >expect &&
 		test_must_fail git remote rm foo 2>actual &&
 		test_i18ncmp expect actual
 	)
@@ -173,7 +173,7 @@ test_expect_success 'remove remote with a branch without configured merge' '
 test_expect_success 'rename errors out early when deleting non-existent branch' '
 	(
 		cd test &&
-		echo "fatal: No such remote: foo" >expect &&
+		echo "fatal: No such remote: '\''foo'\''" >expect &&
 		test_must_fail git remote rename foo bar 2>actual &&
 		test_i18ncmp expect actual
 	)