t / t4101 / diff.3-0on commit index-pack: check .gitmodules files with --strict (73c3f0f)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,2 @@
   4 a
   5-c
   6-b
   7\ No newline at end of file
   8+b