test-lib: do not remove trash_directory if called with --debug

diff --git a/t/t4022-diff-rewrite.sh b/t/t4022-diff-rewrite.sh
index bf996fc414d3b5ea16488a8b274973a8347b29cb..2a537a21e8e6793e6ffa2fe1522e30f877b209fe 100755 (executable)
--- a/t/t4022-diff-rewrite.sh
+++ b/t/t4022-diff-rewrite.sh
@@ -6,12 +6,12 @@ test_description='rewrite diff'
 
 test_expect_success setup '
 
-       cat ../../COPYING >test &&
+       cat "$TEST_DIRECTORY"/../COPYING >test &&
        git add test &&
        tr \
          "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" \
          "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM" \
-         <../../COPYING >test
+         <"$TEST_DIRECTORY"/../COPYING >test
 
 '