Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up dmenu-4.9/dmenu.1 dmenu-4.9-orig/dmenu.1
|--- dmenu-4.9/dmenu.1	2019-09-25 12:55:42.666319316 -0600
|+++ dmenu-4.9-orig/dmenu.1	2019-09-25 12:48:38.848249931 -0600
--------------------------
Patching file dmenu.1 using Plan A...
Reversed (or previously applied) patch detected!  Assuming -R.Hunk #1 succeeded at 3.
Hunk #2 succeeded at 47.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up dmenu-4.9/dmenu.c dmenu-4.9-orig/dmenu.c
|--- dmenu-4.9/dmenu.c	2019-09-25 12:48:55.756173240 -0600
|+++ dmenu-4.9-orig/dmenu.c	2019-09-25 12:48:38.848249931 -0600
--------------------------
Patching file dmenu.c using Plan A...
Reversed (or previously applied) patch detected!  Assuming -R.Hunk #1 succeeded at 37.
Hunk #2 succeeded at 132.
Hunk #3 succeeded at 144.
Hunk #4 succeeded at 531.
Hunk #5 succeeded at 693.
Hunk #6 succeeded at 716.
done