patch 9.0.1436: cannot compare a typed variable with v:none Commit: https://github.com/vim/vim/commit/2ed57ac3675624b9d943d7753f48855e5dbebdbb Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 1 22:05:38 2023 +0100 patch 9.0.1436: cannot compare a typed variable with v:none Problem: Cannot compare a typed variable with v:none. Solution: Allow for "x is v:none" and "x isnot v:none". (issue https://github.com/vim/vim/issues/12194)

" Logtalk filetype plugin file
" Language:         Logtalk
" Maintainer:       Paulo Moura <pmoura@logtalk.org>
" Latest Revision:  2018-08-03

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

let b:undo_ftplugin = "setl ts< sw< fdm< fdc< ai< dict<"

setlocal ts=4
setlocal sw=4
setlocal fdm=syntax
setlocal fdn=10
setlocal fdc=2
setlocal autoindent
setlocal dict=$VIMRUNTIME/ftplugin/logtalk.dict