Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From e37f8981efe54bc620cb2f2280832cdab3959a32 Mon Sep 17 00:00:00 2001
|From: aleks <aleks.stier@icloud.com>
|Date: Thu, 10 Oct 2019 17:35:27 +0200
|Subject: [PATCH] Apply quickcancel
|
|Cancel slock by moving the mouse within a certain time-period after
|slock started. The time-period can be defined in seconds with the
|setting *timetocancel* in the config.h. This is useful if you forgot to
|disable `xautolock` during an activity that requires no input (e.g.
|reading text, watching video).
|---
| config.def.h | 3 +++
| slock.c      | 5 +++++
| 2 files changed, 8 insertions(+)
|
|diff --git a/config.def.h b/config.def.h
|index 9855e21..e0bf95a 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 10.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/slock.c b/slock.c
|index d2f0886..f7462ee 100644
|--- a/slock.c
|+++ b/slock.c
--------------------------
Patching file slock.c using Plan A...
Hunk #1 succeeded at 13.
Hunk #2 succeeded at 25.
Hunk #3 succeeded at 144.
Hunk #4 succeeded at 272.
Hmm...  Ignoring the trailing garbage.
done