Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up st-0.9.3-alpha/config.def.h st-0.9.3-optionscheme-alpha/config.def.h
|--- st-0.9.3-alpha/config.def.h	2025-12-23 16:14:47.967839255 +0300
|+++ st-0.9.3-optionscheme-alpha/config.def.h	2025-12-23 18:36:25.099995678 +0300
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 93 with fuzz 2 (offset -3 lines).
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up st-0.9.3-alpha/st.1 st-0.9.3-optionscheme-alpha/st.1
|--- st-0.9.3-alpha/st.1	2025-12-23 16:14:37.637839051 +0300
|+++ st-0.9.3-optionscheme-alpha/st.1	2025-12-23 21:00:52.432648093 +0300
--------------------------
Patching file st.1 using Plan A...
Hunk #1 succeeded at 4.
Hunk #2 succeeded at 30.
Hunk #3 succeeded at 59.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up st-0.9.3-alpha/st.c st-0.9.3-optionscheme-alpha/st.c
|--- st-0.9.3-alpha/st.c	2025-12-23 16:14:37.637839051 +0300
|+++ st-0.9.3-optionscheme-alpha/st.c	2025-12-23 16:41:21.057870817 +0300
--------------------------
Patching file st.c using Plan A...
Hunk #1 succeeded at 1014.
Hunk #2 succeeded at 1038.
Hunk #3 succeeded at 1366.
Hunk #4 succeeded at 1421.
Hunk #5 succeeded at 1887.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up st-0.9.3-alpha/st.h st-0.9.3-optionscheme-alpha/st.h
|--- st-0.9.3-alpha/st.h	2025-12-23 16:14:37.637839051 +0300
|+++ st-0.9.3-optionscheme-alpha/st.h	2025-12-23 16:38:18.397867197 +0300
--------------------------
Patching file st.h using Plan A...
Hunk #1 succeeded at 59.
Hunk #2 succeeded at 130.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff -up st-0.9.3-alpha/x.c st-0.9.3-optionscheme-alpha/x.c
|--- st-0.9.3-alpha/x.c	2025-12-23 16:14:47.967839255 +0300
|+++ st-0.9.3-optionscheme-alpha/x.c	2025-12-23 16:41:13.161203992 +0300
--------------------------
Patching file x.c using Plan A...
Hunk #1 succeeded at 140 (offset -1 lines).
Hunk #2 succeeded at 153 (offset -1 lines).
Hunk #3 succeeded at 787 (offset -1 lines).
Hunk #4 failed at 804.
Hunk #5 failed at 849.
Hunk #6 succeeded at 856 (offset -10 lines).
Hunk #7 succeeded at 1139 (offset -1 lines).
Hunk #8 failed at 1184.
Hunk #9 succeeded at 1182 (offset -24 lines).
Hunk #10 failed at 1203.
Hunk #11 succeeded at 1248 (offset 2 lines).
Hunk #12 succeeded at 1439 (offset -24 lines).
Hunk #13 succeeded at 1477 (offset 2 lines).
Hunk #14 succeeded at 1558 (offset -24 lines).
Hunk #15 succeeded at 1737 (offset 2 lines).
Hunk #16 succeeded at 2045 (offset -24 lines).
Hunk #17 succeeded at 2128 (offset -2 lines).
4 out of 17 hunks failed
done