send-pack/transport-helper: avoid mentioning a particular branch

When trying to push all matching branches, but none match, we offer a
message suggesting to push the `master` branch.

However, we want to step away from making that branch any more special
than any other branch, so let's reword that message to mention no branch
in particular.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

send-pack.c

@@ -406,7 +406,7 @@ int send_pack(struct send_pack_args *args,
 
 	if (!remote_refs) {
 		fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
-			"Perhaps you should specify a branch such as 'master'.\n");
+			"Perhaps you should specify a branch.\n");
 		return 0;
 	}
 	if (args->atomic && !atomic_supported)

t/t5528-push-default.sh

@@ -98,6 +98,12 @@ test_expect_success 'push from/to new branch with upstream, matching and simple'
 	test_push_failure upstream
 '
 
+test_expect_success '"matching" fails if none match' '
+	git init --bare empty &&
+	test_must_fail git push empty : 2>actual &&
+	test_i18ngrep "Perhaps you should specify a branch" actual
+'
+
 test_expect_success 'push ambiguously named branch with upstream, matching and simple' '
 	git checkout -b ambiguous &&
 	test_config branch.ambiguous.remote parent1 &&

transport-helper.c

@@ -1046,7 +1046,7 @@ static int push_refs(struct transport *transport,
 	if (!remote_refs) {
 		fprintf(stderr,
 			_("No refs in common and none specified; doing nothing.\n"
-			  "Perhaps you should specify a branch such as 'master'.\n"));
+			  "Perhaps you should specify a branch.\n"));
 		return 0;
 	}