Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -u dwm/config.def.h dwmnew/config.def.h
|--- dwm/config.def.h	2020-03-01 19:10:06.676821764 +1300
|+++ dwmnew/config.def.h	2020-03-01 19:29:26.276901430 +1300
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 26.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Only in dwmnew: config.h
|Only in dwmnew: drw.o
|diff -u dwm/dwm.c dwmnew/dwm.c
|--- dwm/dwm.c	2020-03-01 19:10:06.680155097 +1300
|+++ dwmnew/dwm.c	2020-03-01 19:28:26.793564016 +1300
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 93.
Hunk #2 succeeded at 140.
Hunk #3 succeeded at 302.
Hunk #4 succeeded at 1291.
done