Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Author: Jan Christoph Ebersbach <jceb@e-jc.de>
|URL: http://dwm.suckless.org/patches/focusurgent
|focusurgent selects the next window having the urgent flag regardless of the tag
|it is on.  The urgent flag can be artificially set with the following xdotool
|command on any window: xdotool selectwindow -- set_window --urgency 1
|---
|Author: Zhen Xu <xuzhen165@gmail.com>
|Update: adapt to multiple monitors. The original patch was not aware of multiple
|monitors. I tested with two monitors but I don't have access to more monitors.
|
|Index: clean/dwm/config.def.h
|===================================================================
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 60.
Hunk #2 succeeded at 96.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Index: clean/dwm/focusurgent.c
|===================================================================
|--- /dev/null
|+++ b/focusurgent.c
--------------------------
(Creating file focusurgent.c...)
Patching file focusurgent.c using Plan A...
Empty context always matches.
Hunk #1 succeeded at 1.
done