patch 8.1.0717: there is no function for the ":sign jump" command commit https://github.com/vim/vim/commit/6b7b7190aa9e5c4f51bceaebf9275aa5097cfea1 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 11 13:42:41 2019 +0100 patch 8.1.0717: there is no function for the ":sign jump" command Problem: There is no function for the ":sign jump" command. Solution: Add the sign_jump() function. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3780)

" 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