Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --color -r -u dwm-6.2/config.def.h dwm_patched/config.def.h
|--- dwm-6.2/config.def.h	2019-02-02 13:55:28.000000000 +0100
|+++ dwm_patched/config.def.h	2020-07-30 17:23:53.470898016 +0200
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 3.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Only in dwm_patched: drw.o
|diff --color -r -u dwm-6.2/dwm.c dwm_patched/dwm.c
|--- dwm-6.2/dwm.c	2019-02-02 13:55:28.000000000 +0100
|+++ dwm_patched/dwm.c	2020-07-30 17:27:29.083891791 +0200
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 28.
Hunk #2 succeeded at 388.
Hunk #3 succeeded at 699.
Hunk #4 succeeded at 1359.
Hunk #5 succeeded at 1553.
Hunk #6 succeeded at 1810.
done