tests: use 'test_must_be_empty' instead of '! test -s'

diff --git a/t/t2202-add-addremove.sh b/t/t2202-add-addremove.sh
index 6a5a3166b1823e751dfe19a28bf54c147dd798b3..e84079d81fb75da12b8e3098c803b503247a3706 100755 (executable)
--- a/t/t2202-add-addremove.sh
+++ b/t/t2202-add-addremove.sh
@@ -48,8 +48,7 @@ test_expect_success 'Just "git add" is a no-op' '
        >will-not-be-added &&
        git add &&
        git diff-index --name-status --cached HEAD >actual &&
-       >expect &&
-       test_cmp expect actual
+       test_must_be_empty actual
 '
 
 test_done