check_filename: tighten dwim-wildcard ambiguity

diff --git a/t/t7509-commit.sh b/t/t7509-commit.sh
index b61fd3c3c4c949785a595dac0fdcc48f4f7faf93..9ac794052df6ac925733ff8a8852e9759bb0baf0 100755 (executable)
--- a/t/t7509-commit.sh
+++ b/t/t7509-commit.sh
@@ -77,6 +77,7 @@ test_expect_success '--amend option copies authorship' '
        git commit -a --amend -m "amend test" &&
        author_header Initial >expect &&
        author_header HEAD >actual &&
+       test_cmp expect actual &&
 
        echo "amend test" >expect &&
        message_body HEAD >actual &&