Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From a56d910262f04c576760e4cdc7010f526cd0f56f Mon Sep 17 00:00:00 2001
|From: Filip Seman <seman.filip@gmail.com>
|Date: Sat, 28 Aug 2021 16:15:42 +0200
|Subject: [PATCH] Move mouse to selected monitor on focusmon
|
|---
| dwm.c | 1 +
| 1 file changed, 1 insertion(+)
|
|diff --git a/dwm.c b/dwm.c
|index 4465af1..254c933 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 825.
Hmm...  Ignoring the trailing garbage.
done