patch 8.0.0618: NFA regex engine handles [0-z] incorrectly commit https://github.com/vim/vim/commit/bb7943b7920ef2f88cb9b6f46c34c7946c370819 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jun 5 13:30:06 2017 +0200 patch 8.0.0618: NFA regex engine handles [0-z] incorrectly Problem: NFA regex engine handles [0-z] incorrectly. Solution: Return at the right point. (James McCoy, closes https://github.com/vim/vim/issues/1703)

" Tests for :undo

func Test_ex_undo()
  new ex-undo
  setlocal ul=10
  exe "normal ione\n\<Esc>"
  setlocal ul=10
  exe "normal itwo\n\<Esc>"
  setlocal ul=10
  exe "normal ithree\n\<Esc>"
  call assert_equal(4, line('$'))
  undo
  call assert_equal(3, line('$'))
  undo 1
  call assert_equal(2, line('$'))
  undo 0
  call assert_equal(1, line('$'))
  quit!
endfunc