patch 9.0.1036: undo misbehaves when writing from an insert mode mapping Commit: https://github.com/vim/vim/commit/3f8f82772313af9f2417b06651f30988b63e1c96 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 8 21:49:35 2022 +0000 patch 9.0.1036: undo misbehaves when writing from an insert mode mapping Problem: Undo misbehaves when writing from an insert mode mapping. Solution: Sync undo when writing. (closes https://github.com/vim/vim/issues/11674)

" Elm filetype plugin file
" Language: Elm
" Maintainer: Andreas Scharf <as@99n.de>
" Latest Revision: 2022-04-25

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

let s:cpo_save = &cpo
set cpo&vim

setlocal comments=s1fl:{-,mb:\ ,ex:-},:--
setlocal commentstring=--\ %s

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

let &cpo = s:cpo_save
unlet s:cpo_save