patch 8.2.0446: listener with undo of deleting all lines not tested Commit: https://github.com/vim/vim/commit/a07e31af545b91925362854a48c42fee16dd8c28 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 25 21:13:46 2020 +0100 patch 8.2.0446: listener with undo of deleting all lines not tested Problem: Listener with undo of deleting all lines not tested. Solution: Add a test.

" Vim filetype plugin
" Language:	roff(7)
" Maintainer:	Chris Spiegel <cspiegel@gmail.com>
" Last Change:	2019 Apr 24

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

setlocal commentstring=.\\\"%s