t / t4101 / diff.1-3on commit diff: fix a double off-by-one with --ignore-space-at-eol (044fb19)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,3 @@
   4 a
   5-b
   6 c
   7+b
   8\ No newline at end of file