old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from wdom.tests.util import TestCase
  from wdom.tag import EventListener
  
  
  class TestEventListener(TestCase):
      # To be implemented
      EventListener
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from wdom.tests.util import TestCase
  from wdom.event import EventListener
  
  
  class TestEventListener(TestCase):
      # To be implemented
      EventListener
  
subject: Fix import