Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 31b89fe119b4a0298da98891aa37b134facb6311 Mon Sep 17 00:00:00 2001
|From: yasumori <ysmr@protonmail.com>
|Date: Fri, 27 May 2022 00:21:27 -0400
|Subject: [PATCH] This patch allows the user to switch the selected tag of all
| monitors.
|
|For example, if monitor A is currently on tag 1, and monitor B is on tag 2,
|and the user presses MODKEY+SUPERKEY+3, both monitor A and B will switch to
|tag 3 (without changing the currently selected monitor).
|---
| config.def.h |  2 ++
| dwm.c        | 13 +++++++++++++
| 2 files changed, 15 insertions(+)
|
|diff --git a/config.def.h b/config.def.h
|index a2ac963..3f504ab 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 46.
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 5646a5c..28736ee 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 228.
Hunk #2 succeeded at 2051 (offset -4 lines).
Hmm...  Ignoring the trailing garbage.
done