patch 8.1.2286: using border highlight in popup window leaks memory Commit: https://github.com/vim/vim/commit/622b64603748cceafd47f7537b96610e824e0680 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Nov 10 15:16:54 2019 +0100 patch 8.1.2286: using border highlight in popup window leaks memory Problem: Using border highlight in popup window leaks memory. Solution: Free memory before overwriting. (Dominique Pelle, closes https://github.com/vim/vim/issues/5203)

" 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