t / t4135 / git-with backslash.diffon commit do not discard revindex when re-preparing packfiles (1a6d8b9)
   1diff --git "a/post\\image.txt" "b/post\\image.txt"
   2new file mode 100644
   3index 0000000..eff0c54
   4--- /dev/null
   5+++ "b/post\\image.txt"
   6@@ -0,0 +1 @@
   7+postimage