Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -r 46109f7eeb14 dwm.c
|--- a/dwm.c	Mon Dec 21 01:14:28 2009 -0500
|+++ b/dwm.c	Mon Dec 21 01:16:38 2009 -0500
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 1837 (offset -4 lines).
Hunk #2 succeeded at 1876 (offset -4 lines).
done