add NO_EXTERNAL_GREP build option

diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index 6d12efb74d8bedede8e476429b2fccd648eb05a3..91ea69631472d9a13184a58a41a55277746b1498 100755 (executable)
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@@ -45,6 +45,6 @@ A U Thor (5):
 
 EOF
 
-test_expect_success 'shortlog wrapping' 'diff -u expect out'
+test_expect_success 'shortlog wrapping' 'test_cmp expect out'
 
 test_done