patch 8.1.0890: pty allocation wrong if using file for out channel commit https://github.com/vim/vim/commit/593864817a08f9b719a093ef4fd8d4d35132ab86 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 10 22:43:46 2019 +0100 patch 8.1.0890: pty allocation wrong if using file for out channel Problem: Pty allocation wrong if using file for out channel and using null for in channel and null for error channel. Solution: Correct using use_file_for_out in condition. (Ozaki Kiichi, closes #3917)

" Tests for the :set command

function Test_set_backslash()
  let isk_save = &isk

  set isk=a,b,c
  set isk+=d
  call assert_equal('a,b,c,d', &isk)
  set isk+=\\,e
  call assert_equal('a,b,c,d,\,e', &isk)
  set isk-=e
  call assert_equal('a,b,c,d,\', &isk)
  set isk-=\\
  call assert_equal('a,b,c,d', &isk)

  let &isk = isk_save
endfunction

function Test_set_add()
  let wig_save = &wig

  set wildignore=*.png,
  set wildignore+=*.jpg
  call assert_equal('*.png,*.jpg', &wig)

  let &wig = wig_save
endfunction