tests: make use of the test_must_be_empty function

Change various tests that use an idiom of the form:

    >expect &&
    test_cmp expect actual

To instead use:

    test_must_be_empty actual

The test_must_be_empty() wrapper was introduced in ca8d148daf ("test:
test_must_be_empty helper", 2013-06-09). Many of these tests have been
added after that time. This was mostly found with, and manually pruned
from:

    git grep '^\s+>.*expect.* &&$' t

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/t/t6009-rev-list-parent.sh b/t/t6009-rev-list-parent.sh
index 20e3e2554a..916d9692bc 100755
--- a/t/t6009-rev-list-parent.sh
+++ b/t/t6009-rev-list-parent.sh
@@ -31,8 +31,7 @@ test_expect_success setup '
 test_expect_success 'one is ancestor of others and should not be shown' '
 
 	git rev-list one --not four >result &&
-	>expect &&
-	test_cmp expect result
+	test_must_be_empty result
 
 '
 
@@ -144,8 +143,7 @@ test_expect_success 'ancestors with the same commit time' '
 		test_commit t$i
 	done &&
 	git rev-list t1^! --not t$i >result &&
-	>expect &&
-	test_cmp expect result
+	test_must_be_empty result
 '
 
 test_done