Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|URL: http://dwm.suckless.org/patches/statusallmons
|This patch draws and updates the statusbar on all monitors.
|
|Index: dwm/dwm.c
|===================================================================
|--- dwm/dwm.c.orig	2014-02-09 15:24:22.768117261 +0100
|+++ dwm/dwm.c	2014-02-09 15:24:22.764117260 +0100
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 failed at 715.
Hunk #2 failed at 1919.
2 out of 2 hunks failed
done