Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Author: Chris Noxz <chris@noxz.tech>
|
|diff -upN tabbed-0.8-a/tabbed.c tabbed-0.8-b/tabbed.c
|--- tabbed-0.8-a/tabbed.c	2024-03-19 12:23:17.000000000 +0100
|+++ tabbed-0.8-b/tabbed.c	2024-06-11 20:07:21.814961956 +0200
--------------------------
Patching file tabbed.c using Plan A...
Hunk #1 succeeded at 1132.
Hunk #2 succeeded at 1146.
done