patch 8.2.1140: Vim9: return type of extend() is any Commit: https://github.com/vim/vim/commit/b3c019cbc32e2e9250ac668bf77d61ebd89c13f2 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jul 5 20:08:39 2020 +0200 patch 8.2.1140: Vim9: return type of extend() is any Problem: Vim9: return type of extend() is any. Solution: Use type of the argument.

" Vim filetype plugin
" Language:	Java properties file
" Maintainer:	None
" Last Change:	2019 Dec 01

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

setlocal formatoptions-=t
setlocal comments=:#,:!
setlocal commentstring=#\ %s

let b:undo_ftplugin = "setl cms< com< fo<"