t / t4101 / diff.3-2on commit diff: ignore --ita-[in]visible-in-index when diffing worktree-to-tree (ba4e356)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,2 @@
   4 a
   5-c
   6 b
   7\ No newline at end of file