Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|--- dwm.c.orig	2011-12-19 09:02:46.000000000 -0600
|+++ dwm.c	2012-11-12 23:04:14.383441523 -0600
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 54.
Hunk #2 succeeded at 255.
Hunk #3 succeeded at 291.
Hunk #4 succeeded at 760.
Hunk #5 succeeded at 2158.
done