patch 8.1.1919: using window options when passing a buffer to popup_create() Commit: https://github.com/vim/vim/commit/4645104be4c521dfdd43621c19e96bda3cac7be2 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 24 15:50:46 2019 +0200 patch 8.1.1919: using window options when passing a buffer to popup_create() Problem: Using current window option values when passing a buffer to popup_create(). Solution: Clear the window-local options. (closes #4857)

" 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