patch 8.1.0542: shiftwidth() does not take 'vartabstop' into account commit https://github.com/vim/vim/commit/f951416a8396a54bbbe21de1a8b16716428549f2 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Nov 22 03:08:29 2018 +0100 patch 8.1.0542: shiftwidth() does not take 'vartabstop' into account Problem: shiftwidth() does not take 'vartabstop' into account. Solution: Use the cursor position or a position explicitly passed. Also make >> and << work better with 'vartabstop'. (Christian Brabandt)

" 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