commit https://github.com/vim/vim/commit/7c1c6dbb6817640fd3956a0d5417da23fde336d8 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Apr 3 22:08:05 2016 +0200 patch 7.4.1705 Problem: The 'guifont' option does not allow for a quality setting. Solution: Add the "q" item, supported on MS-Windows. (Yasuhiro Matsumoto)

" Test for joining lines.

func Test_join_with_count()
  new
  call setline(1, ['one', 'two', 'three', 'four'])
  normal J
  call assert_equal('one two', getline(1))
  %del
  call setline(1, ['one', 'two', 'three', 'four'])
  normal 10J
  call assert_equal('one two three four', getline(1))
  quit!
endfunc