Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From f4c164a63fc34c9989af15db3c10e6b658586804 Mon Sep 17 00:00:00 2001
|From: Santtu Lakkala <inz@inz.fi>
|Date: Wed, 16 Feb 2022 21:23:44 +0200
|Subject: [PATCH] Alpha background
|
|Building on previous patches, but also apply alpha to the OSC 11, set
|background, sequence.
|---
| config.def.h |  3 +++
| x.c          | 43 +++++++++++++++++++++++++++++++++----------
| 2 files changed, 36 insertions(+), 10 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index 91ab8ca..6af616e 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 93.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/x.c b/x.c
|index 8a16faa..812af66 100644
|--- a/x.c
|+++ b/x.c
--------------------------
Patching file x.c using Plan A...
Hunk #1 succeeded at 105.
Hunk #2 succeeded at 737.
Hunk #3 succeeded at 797.
Hunk #4 succeeded at 831.
Hunk #5 succeeded at 1129.
Hunk #6 succeeded at 1155.
Hunk #7 succeeded at 1175.
Hunk #8 succeeded at 2038.
Hmm...  Ignoring the trailing garbage.
done