old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # pyvows testing engine
  # https://github.com/heynemann/pyvows
  
  # Licensed under the MIT license:
  # http://www.opensource.org/licenses/mit-license
  # Copyright (c) 2011 Bernardo Heynemann heynemann@gmail.com
  
  from pyvows import Vows, expect
  
  
  @Vows.batch
  class ContextClass(Vows.Context):
      entered = False
  
      def topic(self):
          return 1
  
      def should_be_working_fine(self, topic):
          expect(topic).to_equal(1)
  
      def teardown(self):
          # note to readers: 'expect's are not recommended on teardown methods
          expect(self.entered).to_equal(True)
  
      class SubcontextThatDoesntNeedToExtendAgainFromContext:
          entered = False
  
          def topic(self):
              return 2
  
          def should_be_working_fine_too(self, topic):
              self.parent.entered = True
              expect(topic).to_equal(2)
  
          def teardown(self):
              # note to readers: 'expect's are not recommended on teardown methods
              expect(self.entered).to_equal(True)
  
          class SubcontextThatDoesntNeedToExtendAgainFromContext:
              def topic(self):
                  return 3
  
              def should_be_working_fine_too(self, topic):
                  self.parent.entered = True
                  expect(topic).to_equal(3)
  
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # pyvows testing engine
  # https://github.com/heynemann/pyvows
  
  # Licensed under the MIT license:
  # http://www.opensource.org/licenses/mit-license
  # Copyright (c) 2011 Bernardo Heynemann heynemann@gmail.com
  
  from pyvows import Vows, expect
  
  
  @Vows.batch
  class ContextClass(Vows.Context):
      entered = False
  
      def topic(self):
          return 1
  
      def should_be_working_fine(self, topic):
          expect(topic).to_equal(1)
  
      def teardown(self):
          # note to readers: 'expect's are not recommended on teardown methods
          expect(self.entered).to_equal(True)
  
      class SubcontextThatDoesntNeedToExtendAgainFromContext:
          entered = False
  
          def topic(self):
              return 2
  
          def should_be_working_fine_too(self, topic):
              self.parent.entered = True
              expect(topic).to_equal(2)
  
          def teardown(self):
              # note to readers: 'expect's are not recommended on teardown methods
              expect(self.entered).to_equal(True)
  
          class SubcontextThatDoesntNeedToExtendAgainFromContext:
              def topic(self):
                  return 3
  
              def should_be_working_fine_too(self, topic):
                  self.parent.entered = True
                  expect(topic).to_equal(3)
  
subject: remove trailing line flake8