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)

" Vim filetype plugin file
" Language:	Mathematica
" Maintainer:	Ian Ford <ianf@wolfram.com>
" Last Change:	22 January 2019

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
	finish
endif

" Don't load another plugin for this buffer
let b:did_ftplugin = 1

let b:undo_ftplugin = "setlocal commentstring<"

setlocal commentstring=\(*%s*\)