t / t4101 / diff.1-3on commit git-am: fixed patch_format detection according to RFC2822 (6900d75)
   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