Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 8c72f9ea7c9cd8d254b52a4f7059113c41483597 Mon Sep 17 00:00:00 2001
|From: Miles Alan <m@milesalan.com>
|Date: Mon, 17 Aug 2020 20:33:45 -0500
|Subject: [PATCH] Draws a dot indicator overlayed on each tag icon for each
| client. The selected client is drawn as a larger horizontal line.
|
|---
| dwm.c | 14 ++++++++++----
| 1 file changed, 10 insertions(+), 4 deletions(-)
|
|diff --git a/dwm.c b/dwm.c
|index 4465af1..e0ca438 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 695.
Hunk #2 succeeded at 716.
Hmm...  Ignoring the trailing garbage.
done