remove diff's -u

diff --git a/tests/ls/dangle b/tests/ls/dangle
index 3b57069..1c9a55a 100755 (executable)
--- a/tests/ls/dangle
+++ b/tests/ls/dangle
@@ -46,6 +46,6 @@ sub
 EOF
 
 cmp out exp || fail=1
-test $fail = 1 && diff -u out exp 2> /dev/null
+test $fail = 1 && diff out exp 2> /dev/null
 
 (exit $fail); exit $fail