Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 4d58bc01c9a31cdcaad540e67e5f60c87f488b55 Mon Sep 17 00:00:00 2001
|From: prenev <an2qzavok@gmail.com>
|Date: Sun, 1 Nov 2020 15:50:10 +0300
|Subject: [PATCH] tab-separate input lines and only display first parts
|
|---
| dmenu.c | 9 +++++++--
| 1 file changed, 7 insertions(+), 2 deletions(-)
|
|diff --git a/dmenu.c b/dmenu.c
|index 65f25ce..d9e490a 100644
|--- a/dmenu.c
|+++ b/dmenu.c
--------------------------
Patching file dmenu.c using Plan A...
Hunk #1 succeeded at 30.
Hunk #2 succeeded at 124.
Hunk #3 succeeded at 166.
Hunk #4 succeeded at 535.
Hmm...  Ignoring the trailing garbage.
done