Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up dwm-a/config.def.h dwm-b/config.def.h
|--- dwm-a/config.def.h	2024-03-23 15:14:00.173450954 +0100
|+++ dwm-b/config.def.h	2024-03-23 15:35:38.200217214 +0100
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 65.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Only in dwm-b: config.h
|Only in dwm-b: drw.o
|Only in dwm-b: dwm
|diff -up dwm-a/dwm.c dwm-b/dwm.c
|--- dwm-a/dwm.c	2024-03-23 15:14:00.173450954 +0100
|+++ dwm-b/dwm.c	2024-03-23 16:22:58.729308679 +0100
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 168.
Hunk #2 succeeded at 836.
Hmm...  Ignoring the trailing garbage.
done