old_contents: # -*- coding: utf-8 -*-
  import abc
  import wsgiref.simple_server
  
  from . import wsgi_server
  
  
  class ServerAdapter(metaclass=abc.ABCMeta):
      def __init__(self, host='127.0.0.1', port=5000, **options):
          self.host = host
          self.port = port
          self.options = options
  
      @abc.abstractmethod
      def run(self, app):
          pass
  
  
  class BustardServer(ServerAdapter):
  
      def run(self, app):
          httpd = wsgi_server.make_server(
              (self.host, self.port), app, **self.options
          )
          httpd.serve_forever()
  
  
  class WSGIRefServer(ServerAdapter):
  
      def run(self, app):
          httpd = wsgiref.simple_server.make_server(
              self.host, self.port, app, **self.options
          )
          httpd.serve_forever()
  
  
  class WerkzeugfServer(ServerAdapter):
  
      def run(self, app):
          from werkzeug.serving import run_simple
          run_simple(self.host, self.port, app, self.options)
  
new_contents: # -*- coding: utf-8 -*-
  import abc
  import wsgiref.simple_server
  
  from . import wsgi_server
  
  
  class ServerAdapter(metaclass=abc.ABCMeta):
      def __init__(self, host='127.0.0.1', port=5000, **options):
          self.host = host
          self.port = port
          self.options = options
  
      @abc.abstractmethod
      def run(self, app):
          pass
  
  
  class BustardServer(ServerAdapter):
  
      def run(self, app):
          httpd = wsgi_server.make_server(
              (self.host, self.port), app, **self.options
          )
          httpd.serve_forever()
  
  
  class WSGIRefServer(ServerAdapter):
  
      def run(self, app):
          httpd = wsgiref.simple_server.make_server(
              self.host, self.port, app, **self.options
          )
          httpd.serve_forever()
  
  
  class WerkzeugfServer(ServerAdapter):
  
      def run(self, app):
          from werkzeug.serving import run_simple
          run_simple(self.host, self.port, app, **self.options)
  
subject: fix WerkzeugfServer