patch 8.2.0291: Vim9: assigning [] to list<string> doesn't work Commit: https://github.com/vim/vim/commit/436472f5e0328dc4a635b1c344c04a62d64132ea Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 20 22:54:43 2020 +0100 patch 8.2.0291: Vim9: assigning [] to list<string> doesn't work Problem: Vim9: assigning [] to list<string> doesn't work. Solution: Use void for empty list and dict. (Ken Takata, closes https://github.com/vim/vim/issues/5669)

" Vim filetype plugin
" Language:	Dockerfile
" Maintainer:   Honza Pokorny <http://honza.ca>
" Last Change:	2014 Aug 29

" 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 = "setl commentstring<"

setlocal commentstring=#\ %s