t / t4101 / diff.1-2on commit start_command(), .in/.out/.err = -1: Callers must close the file descriptor (e72ae28)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,2 @@
   4 a
   5-b
   6-c
   7+b
   8\ No newline at end of file