commit https://github.com/vim/vim/commit/ded2782783f352201ac0b05c6dbe4831adb4a58b Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jan 2 14:27:34 2017 +0100 patch 8.0.0135 Problem: An address relative to the current line, ":.,+3y", does not work properly on a closed fold. (Efraim Yawitz) Solution: Correct for including the closed fold. (Christian Brabandt)

" 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