t / t4101 / diff.2-3on commit diffcore-pickaxe: support case insensitive match on non-ascii (b51a9c1)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,2 +1,3 @@
   4 a
   5+c
   6 b
   7\ No newline at end of file