Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Common subdirectories: dwm/.git and dwm-new/.git
|diff -up dwm/config.def.h dwm-new/config.def.h
|--- dwm/config.def.h	2019-12-10 17:24:37.944708263 +1300
|+++ dwm-new/config.def.h	2019-12-10 17:44:38.447670711 +1300
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 5.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up dwm/dwm.c dwm-new/dwm.c
|--- dwm/dwm.c	2019-12-10 17:24:37.945708263 +1300
|+++ dwm-new/dwm.c	2019-12-10 17:41:46.192676099 +1300
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 241.
Hunk #2 succeeded at 569.
Hunk #3 succeeded at 707.
Hunk #4 succeeded at 733.
Hunk #5 succeeded at 1549.
Hunk #6 succeeded at 1578.
Hunk #7 succeeded at 1707.
Hunk #8 succeeded at 1817.
Hunk #9 succeeded at 1832.
done