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-rwxr-xr-xt/t4020-diff-external.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/t/t4020-diff-external.sh b/t/t4020-diff-external.sh
index 888293361d..bf8f778a47 100755
--- a/t/t4020-diff-external.sh
+++ b/t/t4020-diff-external.sh
@@ -99,7 +99,7 @@ test_expect_success 'no diff with -diff' '
git diff | grep Binary
'
-echo NULZbetweenZwords | tr Z '\000' > file
+echo NULZbetweenZwords | perl -pe 'y/Z/\000/' > file
test_expect_success 'force diff with "diff"' '
echo >.gitattributes "file diff" &&