patch 8.0.0251: not easy to select Python 2 or 3 commit https://github.com/vim/vim/commit/f42dd3c3901ea0ba38e67a616aea9953cae81b8d Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 28 16:06:38 2017 +0100 patch 8.0.0251: not easy to select Python 2 or 3 Problem: It is not so easy to write a script that works with both Python 2 and Python 3, even when the Python code works with both. Solution: Add 'pyxversion', :pyx, etc. (Marc Weber, Ken Takata)

" 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