Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|commit 0663bdf11a409961da5b1120741a69814da8ce65
|Author: Timo Röhling <timo@gaussglocke.de>
|Date:   Tue Nov 23 19:45:33 2021 +0100
|
|    Terminal scrollback with ring buffer
|    
|    This patch adds a ring buffer for scrollback to the terminal.  The
|    advantage of using a ring buffer is that the common case, scrolling with
|    no static screen content, can be achieved very efficiently by
|    incrementing and decrementing the starting line (modulo buffer size).
|    
|    The scrollback buffer is limited to HISTSIZE lines in order to bound
|    memory usage. As the lines are allocated on demand, it is possible to
|    implement unlimited scrollback with few changes.  If the terminal is
|    reset, the scroll back buffer is reset, too.
|
|diff --git a/config.def.h b/config.def.h
|index 2cd740a..8b25d40 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 201.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/st.c b/st.c
|index b9f66e7..d9b163e 100644
|--- a/st.c
|+++ b/st.c
--------------------------
Patching file st.c using Plan A...
Hunk #1 succeeded at 43.
Hunk #2 succeeded at 113.
Hunk #3 succeeded at 216.
Hunk #4 succeeded at 423.
Hunk #5 succeeded at 537.
Hunk #6 succeeded at 552.
Hunk #7 succeeded at 580.
Hunk #8 succeeded at 618.
Hunk #9 succeeded at 965.
Hunk #10 succeeded at 995.
Hunk #11 succeeded at 1018.
Hunk #12 succeeded at 1042.
Hunk #13 succeeded at 1080.
Hunk #14 succeeded at 1124.
Hunk #15 succeeded at 1158.
Hunk #16 succeeded at 1284.
Hunk #17 succeeded at 1293.
Hunk #18 succeeded at 1319.
Hunk #19 succeeded at 1336.
Hunk #20 succeeded at 1351.
Hunk #21 succeeded at 1368.
Hunk #22 succeeded at 2172.
Hunk #23 succeeded at 2559.
Hunk #24 succeeded at 2576.
Hunk #25 succeeded at 2607.
Hunk #26 succeeded at 2638.
Hunk #27 succeeded at 2726.
Hunk #28 succeeded at 2747.
Hunk #29 succeeded at 2770.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/st.h b/st.h
|index fd3b0d8..3cea73b 100644
|--- a/st.h
|+++ b/st.h
--------------------------
Patching file st.h using Plan A...
Hunk #1 succeeded at 19.
Hmm...  The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/x.c b/x.c
|index bd23686..25785a6 100644
|--- a/x.c
|+++ b/x.c
--------------------------
Patching file x.c using Plan A...
Hunk #1 succeeded at 59.
done