t / t4101 / diff.2-3on commit t6006 (rev-list-format): don't hardcode SHA-1 in expected outputs (77a6815)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,2 +1,3 @@
   4 a
   5+c
   6 b
   7\ No newline at end of file