Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From efa326b2c71f0df1d097fd52a17684f5ccc5df6c Mon Sep 17 00:00:00 2001
|From: Rizqi Nur Assyaufi <bandithijo@gmail.com>
|Date: Sat, 7 Aug 2021 00:24:01 +0800
|Subject: [PATCH] [dwm][patch][togglefloatingcenter] centered togglefloating
| window
|
|Default behaviour when togglefloating() is floating from top-left corner.
|This patch will allows you to toggle floating window client will be centered
|position.
|---
| dwm.c | 4 ++++
| 1 file changed, 4 insertions(+)
|
|diff --git a/dwm.c b/dwm.c
|index 5e4d494..cbedb09 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 1719.
Hmm...  Ignoring the trailing garbage.
done