Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff '--color=auto' -up dwm-6.6/config.def.h systray-dwm-6.6/config.def.h
|--- dwm-6.6/config.def.h	2025-08-09 15:00:55.740267680 +0200
|+++ systray-dwm-6.6/config.def.h	2025-11-18 16:26:31.581907543 +0100
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 3.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff '--color=auto' -up dwm-6.6/dwm.c systray-dwm-6.6/dwm.c
|--- dwm-6.6/dwm.c	2025-08-09 15:00:55.740267680 +0200
|+++ systray-dwm-6.6/dwm.c	2025-11-18 16:35:53.062929489 +0100
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 56.
Hunk #2 succeeded at 155.
Hunk #3 succeeded at 192.
Hunk #4 succeeded at 210.
Hunk #5 succeeded at 230.
Hunk #6 succeeded at 248.
Hunk #7 succeeded at 289.
Hunk #8 succeeded at 474.
Hunk #9 succeeded at 517.
Hunk #10 succeeded at 555.
Hunk #11 succeeded at 659.
Hunk #12 succeeded at 744.
Hunk #13 succeeded at 792.
Hunk #14 succeeded at 801.
Hunk #15 succeeded at 832.
Hunk #16 succeeded at 880.
Hunk #17 succeeded at 970.
Hunk #18 succeeded at 1136.
Hunk #19 succeeded at 1224.
Hunk #20 succeeded at 1352.
Hunk #21 succeeded at 1414.
Hunk #22 succeeded at 1434.
Hunk #23 succeeded at 1457.
Hunk #24 succeeded at 1615.
Hunk #25 succeeded at 1659.
Hunk #26 succeeded at 1747.
Hunk #27 succeeded at 1758.
Hunk #28 succeeded at 1769.
Hunk #29 succeeded at 1780.
Hunk #30 succeeded at 1913.
Hunk #31 succeeded at 2020.
Hunk #32 succeeded at 2042.
Hunk #33 succeeded at 2062.
Hunk #34 succeeded at 2227.
Hunk #35 succeeded at 2414.
Hunk #36 succeeded at 2477.
Hunk #37 succeeded at 2528.
done