fix usage string for git grep

diff --git a/t/t6004-rev-list-path-optim.sh b/t/t6004-rev-list-path-optim.sh
index 80d71988b8464b6abe2b13e3052b54a4bb84604f..5dabf1c5e354c28cc593bd0ea8e4b0d5f0d56d67 100755 (executable)
--- a/t/t6004-rev-list-path-optim.sh
+++ b/t/t6004-rev-list-path-optim.sh
@@ -45,7 +45,7 @@ test_expect_success 'further setup' '
 test_expect_success 'path optimization 2' '
        ( echo "$side"; echo "$initial" ) >expected &&
        git rev-list HEAD -- a >actual &&
-       diff -u expected actual
+       test_cmp expected actual
 '
 
 test_done