t / t4101 / diff.3-2on commit t0303: immediately bail out w/o GIT_TEST_CREDENTIAL_HELPER (16e4481)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,2 @@
   4 a
   5-c
   6 b
   7\ No newline at end of file