Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 44ad1a9255504ef36670f46101689b2ab9d8501e Mon Sep 17 00:00:00 2001
|From: rangerlatham <ghanklatham@gmail.com>
|Date: Sun, 31 Dec 2017 19:26:47 -0500
|Subject: [PATCH] patch that adds ewmh functionality to dwm. see
| dwm.suckless.org/patches/ewmhtags for more details
|
|---
| dwm.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
| 1 file changed, 47 insertions(+), 1 deletion(-)
|
|diff --git a/dwm.c b/dwm.c
|index ec6a27c..018b7aa 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 55.
Hunk #2 succeeded at 64.
Hunk #3 succeeded at 199.
Hunk #4 succeeded at 222.
Hunk #5 succeeded at 1438.
Hunk #6 succeeded at 1543.
Hunk #7 succeeded at 1585.
Hunk #8 succeeded at 1611.
Hunk #9 succeeded at 1626.
Hunk #10 succeeded at 1780.
Hunk #11 succeeded at 1883.
Hunk #12 succeeded at 2088.
Hmm...  Ignoring the trailing garbage.
done