Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 215ec30d6b5fe3319f88f1c9d16a37b6e14e5a53 Mon Sep 17 00:00:00 2001
|From: Bakkeby <bakkeby@gmail.com>
|Date: Mon, 19 Dec 2022 10:20:47 +0100
|Subject: [PATCH] dynamic cursor color: cursor color taken from current
| character
|
|---
| x.c | 17 ++++++++++++++---
| 1 file changed, 14 insertions(+), 3 deletions(-)
|
|diff --git a/x.c b/x.c
|index 2a3bd38..21aadce 100644
|--- a/x.c
|+++ b/x.c
--------------------------
Patching file x.c using Plan A...
Hunk #1 succeeded at 1520.
Hunk #2 succeeded at 1549.
Hmm...  Ignoring the trailing garbage.
done