def METHOD_NAME(tmpdir):
    """Trigger the waiting editor to write without exiting."""
    pidfile = tmpdir / 'editor_pid'
    # give the "editor" process time to write its pid
    for _ in range(10):
        if pidfile.check():
            break
        time.sleep(1)
    pid = int(pidfile.read())
    # windows has no SIGUSR2, but we don't run this on windows anyways
    # for posix, there IS a member so we need to ignore useless-suppression
    # pylint: disable=no-member,useless-suppression
    os.kill(pid, signal.SIGUSR2)