From: Ian Darwin <ian@darwinsys.com>
Subject: Re: Contributing to OBSD
To: Daniel Hejduk <danielhejduk@disroot.org>
Cc: ports@openbsd.org
Date: Thu, 9 May 2024 07:33:31 -0400

On Thu, May 09, 2024 at 01:00:04PM +0200, Daniel Hejduk wrote:
>    Hello, I am new.
>    How can I send/create patch using CVS?
>    Best regards
>    Daniel Hejduk

Put this in ~/.cvsrc

cvs -q
diff -uNp
update -PAd

Then do cvs diff.  Send it with a mail program that doesn't mangle the formatting.