Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 65a6751d45f142760c981ed5fe034dbb640fef63 Mon Sep 17 00:00:00 2001
|From: Jack Bird <jack.bird@durham.ac.uk>
|Date: Sun, 29 Aug 2021 17:17:30 +0100
|Subject: [PATCH] Updated alttags for ed3ab6b4
|
|---
| config.def.h |  3 +++
| dwm.c        | 35 +++++++++++++++++++++++++++++++++--
| 2 files changed, 36 insertions(+), 2 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index a2ac963..80df7db 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 20.
Hunk #2 succeeded at 86 (offset -1 lines).
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..5312b7e 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 130.
Hunk #2 succeeded at 178.
Hunk #3 succeeded at 212.
Hunk #4 succeeded at 257.
Hunk #5 succeeded at 700.
Hunk #6 succeeded at 721.
Hunk #7 succeeded at 1004.
Hunk #8 succeeded at 1721 (offset -2 lines).
Hmm...  Ignoring the trailing garbage.
done