Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 056331da9c6a72b90b32766840eb69e17f33cce8 Mon Sep 17 00:00:00 2001
|From: Harsh Parekh <harsh_parekh@outlook.com>
|Date: Mon, 21 Sep 2020 19:59:56 -0400
|Subject: [PATCH] Apply solarized light colour scheme to dmenu.
|
|---
| config.def.h | 4 ++--
| 1 file changed, 2 insertions(+), 2 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index 1edb647..7645e7f 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 9.
Hmm...  Ignoring the trailing garbage.
done