commit https://github.com/vim/vim/commit/641ad6c7ac7367f95fd927b8efa4bf74ddb9ccf3 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 1 18:32:11 2016 +0200 patch 7.4.2301 Problem: MS-Windows: some files remain after testing. Solution: Close the channel output file. Wait for the file handle to be closed before deleting the file.

" 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