Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From bb3259fd727ae751abb33364e91d73ab1bcda4da Mon Sep 17 00:00:00 2001
|From: Mateus Auler <mateusauler@protonmail.com>
|Date: Sun, 19 Jul 2020 18:03:58 -0300
|Subject: [PATCH] Fixed issue where when moving a client to a different
| monitor, it would incorrectly check the client's previous monitor instead of
| its current one to determine if the gaps and border should be drawn.
|
|---
| config.def.h |  1 +
| dwm.c        | 36 ++++++++++++++++++++++++++++++------
| 2 files changed, 31 insertions(+), 6 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index 1c0b587..b11471d 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 2.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/dwm.c b/dwm.c
|index 9fd0286..79703b3 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 52.
Hunk #2 succeeded at 1277.
Hmm...  Ignoring the trailing garbage.
done