old_contents: from django.template import Context, Template
  from django.test import TestCase
  
  
  template = '''
  {% load md %}
  {% markdown %}
  # Foo
  ## Bar
  Baz
  {% endmarkdown %}
  '''
  
  template_html = '''
  <h1>Foo</h1>
  <h2>Bar</h2>
  <p>Baz</p>
  '''
  
  class MarkdownTestCase(TestCase):
      def test_markdown(self):
          html = Template(template).render(Context({}))
          self.assertHTMLEqual(html, template_html)
  
new_contents: from django.template import Context, Template
  from django.test import TestCase
  
  
  template = '''
  {% load md %}
  {% markdown %}
  # Foo
  ## Bar
  Baz
  {% endmarkdown %}
  '''
  
  template_html = '''
  <h1>Foo</h1>
  <h2>Bar</h2>
  <p>Baz</p>
  '''
  
  
  class MarkdownTestCase(TestCase):
      def test_markdown(self):
          html = Template(template).render(Context({}))
          self.assertHTMLEqual(html, template_html)
  
subject: Fix flake8