patch 9.0.0644: 'smoothscroll' is not copied to a new window on :split Commit: https://github.com/vim/vim/commit/b1fd26d208aadc96d3e8b9215f761150f40a9f91 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Oct 3 11:23:02 2022 +0100 patch 9.0.0644: 'smoothscroll' is not copied to a new window on :split Problem: 'smoothscroll' is not copied to a new window on :split. Solution: Copy the option value. Add a test.

" Vim filetype plugin file
" Language:	hg (Mercurial) commit file
" Maintainer:	Ken Takata <kentkt at csc dot jp>
" Last Change:	2016 Jan 6
" Filenames:	hg-editor-*.txt
" License:	VIM License
" URL:		https://github.com/k-takata/hg-vim

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

setlocal nomodeline

let b:undo_ftplugin = 'setl modeline<'