Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff '--color=auto' -up ../st/config.def.h ./config.def.h
|--- ../st/config.def.h	2022-03-09 08:28:40.186246176 -0300
|+++ ./config.def.h	2022-03-09 08:26:03.194323581 -0300
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 95.
Hunk #2 succeeded at 129.
done