Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 47c1ddc06052c5a86aaab8bc4a5a3fe59995b30b Mon Sep 17 00:00:00 2001
|From: Lars Niesen <lars.niesen@gmx.de>
|Date: Thu, 9 Dec 2021 14:42:13 +0100
|Subject: [PATCH] added zoommtg scheme handler
|
|---
| surf.c | 25 +++++++++++++++++++++++++
| 1 file changed, 25 insertions(+)
|
|diff --git a/surf.c b/surf.c
|index af0fa74..338045c 100644
|--- a/surf.c
|+++ b/surf.c
--------------------------
Patching file surf.c using Plan A...
Hunk #1 succeeded at 217.
Hunk #2 succeeded at 564.
Hunk #3 succeeded at 1185.
Hunk #4 succeeded at 1782.
Hmm...  Ignoring the trailing garbage.
done