Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 51331aed8a535323702b73681c5ce2af6f8f5868 Mon Sep 17 00:00:00 2001
|From: Karol Kosek <krkk@krkk.ct8.pl>
|Date: Sat, 23 Jan 2021 20:16:19 +0100
|Subject: [PATCH] fix mouse hover on vertical lists with prompt text
|
|---
| dmenu.c | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
| 1 file changed, 158 insertions(+), 1 deletion(-)
|
|diff --git a/dmenu.c b/dmenu.c
|index 65f25ce..aff2768 100644
|--- a/dmenu.c
|+++ b/dmenu.c
--------------------------
Patching file dmenu.c using Plan A...
Hunk #1 succeeded at 500.
Hunk #2 succeeded at 711.
Hunk #3 succeeded at 814.
Hmm...  Ignoring the trailing garbage.
done