commit https://github.com/vim/vim/commit/4077b33a8370afb3d5ae74e556a0119cf51fe294 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 20 18:15:21 2016 +0100 patch 7.4.1620 Problem: Emoji characters are not considered as a kind of word character. Solution: Give emoji characters a word class number. (Yasuhiro Matsumoto)

" 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('.'))
  quit!
endfunc