Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From f67d4db0bcef0eb4f601cd25995fd964d60b2a2d Mon Sep 17 00:00:00 2001
|From: aleks <aleks.stier@icloud.com>
|Date: Wed, 27 Jan 2021 16:52:55 +0100
|Subject: [PATCH] [dwm][patch] apply singularbordersbar
|
|`singularbordersbar` changes the way DWM handles the borders. Firstly,
|borders against the left, right, top and bottom screen-edges are removed
|(they are placed off-screen) and secondly, borders between clients now
|overlap eachother. A border between the clients and the bar is also
|created.
|---
| dwm.c | 24 +++++++++++++++++++-----
| 1 file changed, 19 insertions(+), 5 deletions(-)
|
|diff --git a/dwm.c b/dwm.c
|index 4465af1..d359d0a 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 205.
Hunk #2 succeeded at 1113.
Hunk #3 succeeded at 1638.
Hunk #4 succeeded at 1695.
Hmm...  Ignoring the trailing garbage.
done