Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|URL: http://dwm.suckless.org/patches/historical/float_border_color
|float_border_color2 allows you to specify a different border color for floating
|windows.
|
|Index: dwm/config.def.h
|===================================================================
|--- dwm/config.def.h.orig
|+++ dwm/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 12.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Index: dwm/dwm.c
|===================================================================
|--- dwm/dwm.c.orig
|+++ dwm/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 57.
Hunk #2 succeeded at 810.
Hunk #3 succeeded at 1072.
Hunk #4 succeeded at 1086.
Hunk #5 succeeded at 1592.
Hunk #6 succeeded at 1715.
done