diff-parseopt: restore -U (no argument) behavior

diff --git a/t/t6022-merge-rename.sh b/t/t6022-merge-rename.sh
index b760c223c6a56609b7dace5353671aec8243b85d..53cc9b2ffbdbc551c358c8d5d1d4185ef63f0c0b 100755 (executable)
--- a/t/t6022-merge-rename.sh
+++ b/t/t6022-merge-rename.sh
@@ -893,8 +893,7 @@ test_expect_success 'do not follow renames for empty files' '
        git mv empty1 empty2 &&
        git commit -m rename &&
        test_must_fail git merge empty-base &&
-       >expect &&
-       test_cmp expect empty2
+       test_must_be_empty empty2
 '
 
 test_done