t / t4101 / diff.1-3on commit git-p4: add the `p4-pre-submit` hook (251c8c5)
   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