patch 8.1.1746: ":dl" is seen as ":dlist" instead of ":delete" commit https://github.com/vim/vim/commit/94f82cbacf76767b5ac32f813e1d670501dbd0e6 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 24 22:30:27 2019 +0200 patch 8.1.1746: ":dl" is seen as ":dlist" instead of ":delete" Problem: ":dl" is seen as ":dlist" instead of ":delete". Solution: Do not use cmdidxs2[] if the length is 1. (closes https://github.com/vim/vim/issues/4721)

" 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! " . fnameescape(fname)
    let status = v:true
  endtry
  call assert_true(status, "ExclamationMark")
  call delete(fname)
endfunc