Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up surf-2.0/surf.c surf/surf.c
|--- surf-2.0/surf.c	2018-04-13 10:55:11.036959113 +0200
|+++ surf/surf.c	2018-04-14 12:12:41.519989478 +0200
--------------------------
Patching file surf.c using Plan A...
Hunk #1 succeeded at 179.
Hunk #2 succeeded at 1002 (offset -152 lines).
Hunk #3 succeeded at 1229 (offset -4 lines).
done