Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -upN a/config.def.h b/config.def.h
|--- a/config.def.h	2019-05-28 13:43:00.326646120 +0200
|+++ b/config.def.h	2019-05-29 00:33:28.536627035 +0200
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 36.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -upN a/gaplessgrid.c b/gaplessgrid.c
|--- a/gaplessgrid.c	1970-01-01 01:00:00.000000000 +0100
|+++ b/gaplessgrid.c	2019-06-25 00:26:33.779968246 +0200
--------------------------
(Creating file gaplessgrid.c...)
Patching file gaplessgrid.c using Plan A...
Empty context always matches.
Hunk #1 succeeded at 1.
done