Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 8c48f1564c555bbd21758a3a70a9984e61c34a35 Mon Sep 17 00:00:00 2001
|From: 6d6f7274686f6e <4648531+6d6f7274686f6e@users.noreply.github.com>
|Date: Wed, 17 Mar 2021 10:59:18 +0100
|Subject: [PATCH] xresources support
|
|---
| config.def.h | 27 ++++++++++++++------
| tabbed.c     | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++
| 2 files changed, 89 insertions(+), 7 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index defa426..244e288 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 1.
Hunk #2 succeeded at 33.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/tabbed.c b/tabbed.c
|index eafe28a..c5bffc7 100644
|--- a/tabbed.c
|+++ b/tabbed.c
--------------------------
Patching file tabbed.c using Plan A...
Hunk #1 succeeded at 13.
Hunk #2 succeeded at 86.
Hunk #3 succeeded at 136.
Hunk #4 succeeded at 262.
Hunk #5 succeeded at 931.
Hunk #6 succeeded at 1422.
Hmm...  Ignoring the trailing garbage.
done