update-ref --stdin: make error messages more consistent

The old error messages emitted for invalid input sometimes said
"<oldvalue>"/"<newvalue>" and sometimes said "old value"/"new value".
Convert them all to the former.  Update the tests accordingly.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/update-ref.c

@@ -40,7 +40,7 @@ static void update_store_new_sha1(const char *command,
 				  const char *newvalue)
 {
 	if (*newvalue && get_sha1(newvalue, update->new_sha1))
-		die("%s %s: invalid new value: %s",
+		die("%s %s: invalid <newvalue>: %s",
 		    command, update->ref_name, newvalue);
 }
 
@@ -49,7 +49,7 @@ static void update_store_old_sha1(const char *command,
 				  const char *oldvalue)
 {
 	if (*oldvalue && get_sha1(oldvalue, update->old_sha1))
-		die("%s %s: invalid old value: %s",
+		die("%s %s: invalid <oldvalue>: %s",
 		    command, update->ref_name, oldvalue);
 
 	/* We have an old value if non-empty, or if empty without -z */
@@ -198,7 +198,7 @@ static const char *parse_cmd_create(struct strbuf *input, const char *next)
 		die("create %s missing <newvalue>", update->ref_name);
 
 	if (is_null_sha1(update->new_sha1))
-		die("create %s given zero new value", update->ref_name);
+		die("create %s given zero <newvalue>", update->ref_name);
 
 	if (*next != line_termination)
 		die("create %s has extra input: %s", update->ref_name, next);
@@ -220,7 +220,7 @@ static const char *parse_cmd_delete(struct strbuf *input, const char *next)
 	if (!parse_next_arg(input, &next, &oldvalue)) {
 		update_store_old_sha1("delete", update, oldvalue.buf);
 		if (update->have_old && is_null_sha1(update->old_sha1))
-			die("delete %s given zero old value", update->ref_name);
+			die("delete %s given zero <oldvalue>", update->ref_name);
 	} else if (!line_termination)
 		die("delete %s missing [<oldvalue>] NUL", update->ref_name);
 

t/t1400-update-ref.sh

@@ -518,21 +518,21 @@ test_expect_success 'stdin update ref fails with wrong old value' '
 test_expect_success 'stdin update ref fails with bad old value' '
 	echo "update $c $m does-not-exist" >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: update $c: invalid old value: does-not-exist" err &&
+	grep "fatal: update $c: invalid <oldvalue>: does-not-exist" err &&
 	test_must_fail git rev-parse --verify -q $c
 '
 
 test_expect_success 'stdin create ref fails with bad new value' '
 	echo "create $c does-not-exist" >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: create $c: invalid new value: does-not-exist" err &&
+	grep "fatal: create $c: invalid <newvalue>: does-not-exist" err &&
 	test_must_fail git rev-parse --verify -q $c
 '
 
 test_expect_success 'stdin create ref fails with zero new value' '
 	echo "create $c " >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: create $c given zero new value" err &&
+	grep "fatal: create $c given zero <newvalue>" err &&
 	test_must_fail git rev-parse --verify -q $c
 '
 
@@ -556,7 +556,7 @@ test_expect_success 'stdin delete ref fails with wrong old value' '
 test_expect_success 'stdin delete ref fails with zero old value' '
 	echo "delete $a " >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: delete $a given zero old value" err &&
+	grep "fatal: delete $a given zero <oldvalue>" err &&
 	git rev-parse $m >expect &&
 	git rev-parse $a >actual &&
 	test_cmp expect actual
@@ -840,14 +840,14 @@ test_expect_success 'stdin -z update ref fails with wrong old value' '
 test_expect_success 'stdin -z update ref fails with bad old value' '
 	printf $F "update $c" "$m" "does-not-exist" >stdin &&
 	test_must_fail git update-ref -z --stdin <stdin 2>err &&
-	grep "fatal: update $c: invalid old value: does-not-exist" err &&
+	grep "fatal: update $c: invalid <oldvalue>: does-not-exist" err &&
 	test_must_fail git rev-parse --verify -q $c
 '
 
 test_expect_success 'stdin -z create ref fails with bad new value' '
 	printf $F "create $c" "does-not-exist" >stdin &&
 	test_must_fail git update-ref -z --stdin <stdin 2>err &&
-	grep "fatal: create $c: invalid new value: does-not-exist" err &&
+	grep "fatal: create $c: invalid <newvalue>: does-not-exist" err &&
 	test_must_fail git rev-parse --verify -q $c
 '
 
@@ -878,7 +878,7 @@ test_expect_success 'stdin -z delete ref fails with wrong old value' '
 test_expect_success 'stdin -z delete ref fails with zero old value' '
 	printf $F "delete $a" "$Z" >stdin &&
 	test_must_fail git update-ref -z --stdin <stdin 2>err &&
-	grep "fatal: delete $a given zero old value" err &&
+	grep "fatal: delete $a given zero <oldvalue>" err &&
 	git rev-parse $m >expect &&
 	git rev-parse $a >actual &&
 	test_cmp expect actual