Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --color -up tabbed-0.6-clean/config.def.h tabbed-0.6-modified/config.def.h
|--- tabbed-0.6-clean/config.def.h	2014-01-21 10:22:03.000000000 -0800
|+++ tabbed-0.6-modified/config.def.h	2021-03-30 20:23:45.752478278 -0700
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 10.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
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|diff --color -up tabbed-0.6-clean/tabbed.c tabbed-0.6-modified/tabbed.c
|--- tabbed-0.6-clean/tabbed.c	2014-01-21 10:22:03.000000000 -0800
|+++ tabbed-0.6-modified/tabbed.c	2021-03-30 20:24:23.712477426 -0700
--------------------------
Patching file tabbed.c using Plan A...
Hunk #1 succeeded at 920.
done