old_contents: """accounts app unittests
  
  """
  from django.test import TestCase
  
  
  class WelcomePageTest(TestCase):
      def test_uses_welcome_template(self):
          response = self.client.get('/')
          self.assertTemplateUsed(response, 'accounts/welcome.html')
  
new_contents: """accounts app unittests
  
  """
  from django.test import TestCase
  
  
  class WelcomePageTest(TestCase):
      """Tests relating to the welcome_page view.
  
      """
      def test_uses_welcome_template(self):
          """The root url should response with the welcome page template.
  
          """
          response = self.client.get('/')
          self.assertTemplateUsed(response, 'accounts/welcome.html')
  
subject: Add docstrings to unit test