Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From e61a957ff8b7e14219b5fbaab9da794b722e7874 Mon Sep 17 00:00:00 2001
|From: Hai Nguyen <hhai2105@gmail.com>
|Date: Fri, 10 Dec 2021 21:45:00 -0500
|Subject: [PATCH] add Keychord struct, change keypress() and grabkeys() to be
| able to grab a sequence of keystroke
|
|---
| config.def.h | 67 ++++++++++++++++++++++++++------------------------
| dwm.c        | 69 ++++++++++++++++++++++++++++++++++++++++------------
| 2 files changed, 88 insertions(+), 48 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index a2ac963..15a3e05 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 46.
Hunk #2 succeeded at 60.
Hunk #3 succeeded at 95.
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 5e4d494..56c4661 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 102.
Hunk #2 succeeded at 273.
Hunk #3 succeeded at 957.
Hunk #4 succeeded at 992.
Hmm...  Ignoring the trailing garbage.
done