t / t4101 / diff.1-3on commit read-cache: force split index mode with GIT_TEST_SPLIT_INDEX (d6e3c18)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,3 @@
   4 a
   5-b
   6 c
   7+b
   8\ No newline at end of file