t / t4101 / diff.2-0on commit Utilise our new p4_read_pipe and p4_write_pipe wrappers (a7d3ef9)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,2 +1,2 @@
   4 a
   5-b
   6\ No newline at end of file
   7+b