Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 6b7e7e6c5c44dd6347ad49691b80d808c1b0cb77 Mon Sep 17 00:00:00 2001
|From: Jernej Jakob <jernej.jakob@gmail.com>
|Date: Mon, 1 Jul 2024 14:00:02 +0200
|Subject: [PATCH] [st][patch] Update st-scrollback-mouse for 0.9.2
|
|---
| config.def.h | 2 ++
| 1 file changed, 2 insertions(+)
|
|diff --git a/config.def.h b/config.def.h
|index 8b25d40..d259675 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 176.
Hmm...  Ignoring the trailing garbage.
done