patch 8.1.1357: test 37 is old style commit https://github.com/vim/vim/commit/999dc14644b8a9530ce0da22e90ca402c95c9c5a Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 19 21:44:08 2019 +0200 patch 8.1.1357: test 37 is old style Problem: Test 37 is old style. Solution: Turn it into a new style test. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/4398)

" 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