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 file
" Language:	bst
" Author:	Tim Pope <vimNOSPAM@tpope.info>
" $Id: bst.vim,v 1.1 2007/05/05 17:37:57 vimboss Exp $

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

setlocal commentstring=%\ %s
setlocal comments=:%
setlocal fo-=t fo+=croql

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