patch 8.1.0679: sign functions do not take buffer argument as documented commit https://github.com/vim/vim/commit/2cbc1a02cb72916dfdbd0d307512c7c3fb766edf Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jan 2 13:40:31 2019 +0100 patch 8.1.0679: sign functions do not take buffer argument as documented Problem: Sign functions do not take buffer argument as documented. Solution: Use get_buf_tv(). (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3755)

" Tests for saving/loading a file with some lines ending in
" CTRL-M, some not
func Test_lineending()
  let l = ["this line ends in a\<CR>",
	      \ "this one doesn't",
	      \ "this one does\<CR>",
	      \ "and the last one doesn't"]
  set ta tx
  enew!
  call append(0, l)
  $delete
  write Xfile1
  bwipe Xfile1
  edit Xfile1
  let t = getline(1, '$')
  call assert_equal(l, t)
  new | only
  call delete('Xfile1')
endfunc