old_contents: # -*- coding: utf-8 -
  #
  # This file is part of gunicorn released under the MIT license.
  # See the NOTICE for more information.
  #
  # Example code from Eventlet sources
  
  import os
  from wsgiref.validate import validator
  import sys
  
  from gunicorn import __version__
  #@validator
  def app(environ, start_response):
      """Simplest possible application object"""
  
      data = b'Hello, World!\n'
      status = '200 OK'
  
      response_headers = [
          ('Content-type','text/plain'),
          ('Content-Length', str(len(data))),
          ('X-Gunicorn-Version', __version__),
          ("Test", "test тест"),
      ]
      start_response(status, response_headers)
      return iter([data])
  
new_contents: # -*- coding: utf-8 -
  #
  # This file is part of gunicorn released under the MIT license.
  # See the NOTICE for more information.
  #
  # Example code from Eventlet sources
  
  import os
  import pprint
  from wsgiref.validate import validator
  import sys
  
  from gunicorn import __version__
  #@validator
  def app(environ, start_response):
      """Simplest possible application object"""
  
      errors = environ['wsgi.errors']
      pprint.pprint(('ENVIRON', environ), stream=errors)
  
      data = b'Hello, World!\n'
      status = '200 OK'
  
      response_headers = [
          ('Content-type','text/plain'),
          ('Content-Length', str(len(data))),
          ('X-Gunicorn-Version', __version__),
          ("Test", "test тест"),
      ]
      start_response(status, response_headers)
      return iter([data])
  
subject: add a quick test to make sure we get the sys.stderr