patch 8.1.0767: when deleting lines at the bottom signs are misplaced commit https://github.com/vim/vim/commit/c771bf901622064dc27421b04853e16b6914a295 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 17 17:36:45 2019 +0100 patch 8.1.0767: when deleting lines at the bottom signs are misplaced Problem: When deleting lines at the bottom signs are misplaced. Solution: Properly update the line number of signs at the end of a buffer after a delete/undo operation. (Yegappan Lakshmanan, closes #3798)

" Test feedkeys() function.

func Test_feedkeys_x_with_empty_string()
  new
  call feedkeys("ifoo\<Esc>")
  call assert_equal('', getline('.'))
  call feedkeys('', 'x')
  call assert_equal('foo', getline('.'))

  " check it goes back to normal mode immediately.
  call feedkeys('i', 'x')
  call assert_equal('foo', getline('.'))
  quit!
endfunc