Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up a/slock.c b/slock.c
|--- a/slock.c	2026-07-28 03:28:03.120285888 +0530
|+++ b/slock.c	2026-08-03 11:20:35.223992495 +0530
--------------------------
Patching file slock.c using Plan A...
Hunk #1 succeeded at 6.
Hunk #2 succeeded at 61.
Hunk #3 succeeded at 302.
Hunk #4 succeeded at 341.
Hunk #5 succeeded at 351.
Hunk #6 succeeded at 414.
done