Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 1904cbc9af2d518a77331deb082750366aaec90b Mon Sep 17 00:00:00 2001
|From: aleks <aleks.stier@icloud.com>
|Date: Tue, 31 May 2022 13:09:47 +0200
|Subject: [PATCH] Use nord-theme
|
|*"Inspired by the beauty of the arctic, the colors reflect the cold, yet
|harmonious world of ice and the colorfulness of the Aurora Borealis."* -
|[Nord Theme](https://www.nordtheme.com/)
|
|The default behaviour of st is to reverse the fore- and background
|colors of each selected cell. If you don't want the selection-colors to
|be reveresed but instead have fixed fore- and background colors apply on
|top of this patch the [selectioncolors](../selectioncolors/)-patch. Then
|set the following settings in your config.h:
|
|unsigned int selectionbg = 0;
|unsigned int selectionfg = 256;
|---
| config.def.h | 42 ++++++++++++++++++++----------------------
| 1 file changed, 20 insertions(+), 22 deletions(-)
|
|diff --git a/config.def.h b/config.def.h
|index 91ab8ca..afd00fd 100644
|--- a/config.def.h
|+++ b/config.def.h
--------------------------
Patching file config.def.h using Plan A...
Hunk #1 succeeded at 96.
Hunk #2 succeeded at 127.
Hmm...  Ignoring the trailing garbage.
done