completion: optimize refs completion

diff --git a/t/t4027-diff-submodule.sh b/t/t4027-diff-submodule.sh
index d99814ac641c93383d7199f4419083bedcfc9ea8..518bf9524e0b55181f3c440d202b69c12a0b314f 100755 (executable)
--- a/t/t4027-diff-submodule.sh
+++ b/t/t4027-diff-submodule.sh
@@ -5,7 +5,6 @@ test_description='difference in submodules'
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/diff-lib.sh
 
-_z40=0000000000000000000000000000000000000000
 test_expect_success setup '
        test_tick &&
        test_create_repo sub &&
@@ -316,11 +315,11 @@ test_expect_success 'git diff (empty submodule dir)' '
 test_expect_success 'conflicted submodule setup' '
 
        # 39 efs
-       c=fffffffffffffffffffffffffffffffffffffff
+       c=fffffffffffffffffffffffffffffffffffffff &&
        (
-               echo "000000 $_z40 0    sub"
-               echo "160000 1$c 1      sub"
-               echo "160000 2$c 2      sub"
+               echo "000000 $_z40 0    sub" &&
+               echo "160000 1$c 1      sub" &&
+               echo "160000 2$c 2      sub" &&
                echo "160000 3$c 3      sub"
        ) | git update-index --index-info &&
        echo >expect.nosub '\''diff --cc sub