t / t4135 / git-with backslash.diffon commit log: add -P as a synonym for --perl-regexp (7531a2d)
   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