patch 8.2.3336: behavior of negative index in list change changed Commit: https://github.com/vim/vim/commit/92f05f21afdb8a43581554a252cb2fc050f9e03b Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 12 21:12:56 2021 +0200 patch 8.2.3336: behavior of negative index in list change changed Problem: Behavior of negative index in list change changed. (Naruhiko Nishino) Solution: Only change it for Vim9 script. (closes #8749)

" Vim filetype plugin file
" Language:	groovy
" Maintainer:	Justin M. Keyes <justinkz@gmail.com>
" Last Change:	2016 May 22

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

let s:cpo_save = &cpo
set cpo-=C

let b:undo_ftplugin = 'setlocal commentstring<'

setlocal commentstring=//%s

let &cpo = s:cpo_save
unlet s:cpo_save