Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 3f37b2fc545b90e80658c6489846cca23d936939 Mon Sep 17 00:00:00 2001
|From: prenev <an2qzavok@gmail.com>
|Date: Sun, 23 Oct 2022 02:16:54 +0300
|Subject: [PATCH] tab-separate input lines and only display first parts
|
|---
| dmenu.c | 8 +++++---
| 1 file changed, 5 insertions(+), 3 deletions(-)
|
|diff --git a/dmenu.c b/dmenu.c
|index 7cf253b..8eed38a 100644
|--- a/dmenu.c
|+++ b/dmenu.c
--------------------------
Patching file dmenu.c using Plan A...
Hunk #1 succeeded at 30.
Hunk #2 succeeded at 141.
Hunk #3 succeeded at 183.
Hunk #4 succeeded at 561.
Hmm...  Ignoring the trailing garbage.
done