patch 8.1.2008: error for invalid range when using listener and undo Commit: https://github.com/vim/vim/commit/4544bd2f247425c9dd743c76618dd70f53c72538 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 8 15:27:21 2019 +0200 patch 8.1.2008: error for invalid range when using listener and undo Problem: Error for invalid range when using listener and undo. (Paul Jolly) Solution: Do not change the cursor before the lines are restored. (closes #4908)

" Test if fnameescape is correct for special chars like !
func Test_fnameescape()
  let fname = 'Xspa ce'
  let status = v:false
  try
    exe "w! " . fnameescape(fname)
    let status = v:true
  endtry
  call assert_true(status, "Space")
  call delete(fname)

  let fname = 'Xemark!'
  let status = v:false
  try
    exe "w! " . fname->fnameescape()
    let status = v:true
  endtry
  call assert_true(status, "ExclamationMark")
  call delete(fname)
endfunc