Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From e2cbe709046b733d2a770beb315ef5511abe9a19 Mon Sep 17 00:00:00 2001
|From: Wojciech Madry <madrywojciech99@gmail.com>
|Date: Fri, 17 Jan 2025 17:11:48 +0100
|Subject: [PATCH] Sort matches by popularity
|
|Patch will sort all matched instances by popularity.
|Each time you open any program, the popularity is increased by 1.
|The popularity is stored in the .cache folder.
|---
| dmenu.c | 186 +++++++++++++++++++++++++++++++++++++++++++++++++-------
| 1 file changed, 165 insertions(+), 21 deletions(-)
|
|diff --git a/dmenu.c b/dmenu.c
|index 804da64..cb26068 100644
|--- a/dmenu.c
|+++ b/dmenu.c
--------------------------
Patching file dmenu.c using Plan A...
Hunk #1 succeeded at 35.
Hunk #2 succeeded at 107.
Hunk #3 succeeded at 234.
Hunk #4 succeeded at 293.
Hunk #5 succeeded at 310.
Hunk #6 succeeded at 538.
Hunk #7 succeeded at 761.
Hunk #8 succeeded at 930.
Hmm...  Ignoring the trailing garbage.
done