t/t3701-add-interactive.sh: change from skip_all=* to prereq skip

diff --git a/t/t4027-diff-submodule.sh b/t/t4027-diff-submodule.sh
index 559b41eccde63e8bae10806a22df63a82bf127ce..1bd8e5ee3ac5ca4d101738048e6769ae798b23dc 100755 (executable)
--- a/t/t4027-diff-submodule.sh
+++ b/t/t4027-diff-submodule.sh
@@ -105,15 +105,15 @@ test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match)'
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual.body &&
        git diff --ignore-submodules HEAD >actual2 &&
-       echo -n "" | test_cmp - actual2 &&
+       ! test -s actual2 &&
        git diff --ignore-submodules=untracked HEAD >actual3 &&
        sed -e "1,/^@@/d" actual3 >actual3.body &&
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual3.body &&
        git diff --ignore-submodules=dirty HEAD >actual4 &&
-       echo -n "" | test_cmp - actual4
+       ! test -s actual4
 '
-test_done
+
 test_expect_success 'git diff HEAD with dirty submodule (index, refs match)' '
        (
                cd sub &&
@@ -139,11 +139,11 @@ test_expect_success 'git diff HEAD with dirty submodule (untracked, refs match)'
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual.body &&
        git diff --ignore-submodules=all HEAD >actual2 &&
-       echo -n "" | test_cmp - actual2 &&
+       ! test -s actual2 &&
        git diff --ignore-submodules=untracked HEAD >actual3 &&
-       echo -n "" | test_cmp - actual3 &&
+       ! test -s actual3 &&
        git diff --ignore-submodules=dirty HEAD >actual4 &&
-       echo -n "" | test_cmp - actual4
+       ! test -s actual4
 '
 
 test_expect_success 'git diff (empty submodule dir)' '