commit https://github.com/vim/vim/commit/796aa9c804f09276bd3cc45123f4a191a001dec2 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 2 21:41:28 2016 +0200 patch 7.4.2144 Problem: On MS-Windows quickix does not handle a line with 1023 bytes ending in CR-LF properly. Solution: Don't consider CR a line break. (Ken Takata)

" 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