patch 8.0.1276: key lost when window closed in exit callback commit https://github.com/vim/vim/commit/a3f7e58bf846b28b347a5d5b96c2d829871bd212 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Nov 9 13:21:58 2017 +0100 patch 8.0.1276: key lost when window closed in exit callback Problem: Typed key is lost when the terminal window is closed in exit callback. (Gabriel Barta) Solution: When the current window changes bail out of the wait loop. (closes #2302)

" Test if fnameescape is correct for special chars like !
function! 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)
endfunction