Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 166fe643c650defe3b9b18367969dd1359775e0b Mon Sep 17 00:00:00 2001
|From: Miles Alan <m@milesalan.com>
|Date: Mon, 17 Aug 2020 21:46:14 -0500
|Subject: [PATCH] Combination of the clientindicators & hidevacant patches
|
|The clientindicator patch draws a dot indicator overlayed on each tag icon
|for each client. The selected client is drawn as a larger horizontal line.
|
|The hidevacant patch hides tags which have no clients.
|---
| dwm.c | 31 +++++++++++++++++++++++--------
| 1 file changed, 23 insertions(+), 8 deletions(-)
|
|diff --git a/dwm.c b/dwm.c
|index 4465af1..969b129 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 416.
Hunk #2 succeeded at 431.
Hunk #3 succeeded at 700.
Hunk #4 succeeded at 715.
Hmm...  Ignoring the trailing garbage.
done