Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 2916c7a93066da8005e2e30c1e9d90b1e25ac1a1 Mon Sep 17 00:00:00 2001
|From: sympodius <mail@sympodius.net>
|Date: Sat, 30 Apr 2022 10:57:37 +0100
|Subject: [PATCH] The 'tilewide' layout is a variant of the standard 'tile'
| layout for dwm. Windows added to the master area will be positioned side by
| side, instead of one on top of the other. This makes better use of screen
| space on ultra wide monitors. The stack area remains identical to the
| original 'tile' layout.
|
|---
| config.def.h |  2 ++
| dwm.c        | 29 +++++++++++++++++++++++++++++
| 2 files changed, 31 insertions(+)
|
|diff --git a/config.def.h b/config.def.h
|index a2ac963..e7cd62b 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 42.
Hunk #2 succeeded at 78.
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 a96f33c..b3ac43b 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 234.
Hunk #2 succeeded at 2154.
Hmm...  Ignoring the trailing garbage.
done