old_contents: # Exceptions
  import sys
  
  
  class StripeError(Exception):
  
      def __init__(self, message=None, http_body=None, http_status=None,
                   json_body=None, headers=None):
          super(StripeError, self).__init__(message)
  
          if http_body and hasattr(http_body, 'decode'):
              try:
                  http_body = http_body.decode('utf-8')
              except BaseException:
                  http_body = ('<Could not decode body as utf-8. '
                               'Please report to support@stripe.com>')
  
          self._message = message
          self.http_body = http_body
          self.http_status = http_status
          self.json_body = json_body
          self.headers = headers or {}
          self.request_id = self.headers.get('request-id', None)
  
      def __unicode__(self):
          if self.request_id is not None:
              msg = self._message or "<empty message>"
              return u"Request {0}: {1}".format(self.request_id, msg)
          else:
              return self._message
  
      if sys.version_info > (3, 0):
          def __str__(self):
              return self.__unicode__()
      else:
          def __str__(self):
              return unicode(self).encode('utf-8')
  
  
  class APIError(StripeError):
      pass
  
  
  class APIConnectionError(StripeError):
      pass
  
  
  class CardError(StripeError):
  
      def __init__(self, message, param, code, http_body=None,
                   http_status=None, json_body=None, headers=None):
          super(CardError, self).__init__(
              message, http_body, http_status, json_body,
              headers)
          self.param = param
          self.code = code
  
  
  class InvalidRequestError(StripeError):
  
      def __init__(self, message, param, http_body=None,
                   http_status=None, json_body=None, headers=None):
          super(InvalidRequestError, self).__init__(
              message, http_body, http_status, json_body,
              headers)
          self.param = param
  
  
  class AuthenticationError(StripeError):
      pass
  
  class PermissionsError(StripeError):
      pass
  
  class RateLimitError(StripeError):
      pass
  
new_contents: # Exceptions
  import sys
  
  
  class StripeError(Exception):
  
      def __init__(self, message=None, http_body=None, http_status=None,
                   json_body=None, headers=None):
          super(StripeError, self).__init__(message)
  
          if http_body and hasattr(http_body, 'decode'):
              try:
                  http_body = http_body.decode('utf-8')
              except BaseException:
                  http_body = ('<Could not decode body as utf-8. '
                               'Please report to support@stripe.com>')
  
          self._message = message
          self.http_body = http_body
          self.http_status = http_status
          self.json_body = json_body
          self.headers = headers or {}
          self.request_id = self.headers.get('request-id', None)
  
      def __unicode__(self):
          if self.request_id is not None:
              msg = self._message or "<empty message>"
              return u"Request {0}: {1}".format(self.request_id, msg)
          else:
              return self._message
  
      if sys.version_info > (3, 0):
          def __str__(self):
              return self.__unicode__()
      else:
          def __str__(self):
              return unicode(self).encode('utf-8')
  
  
  class APIError(StripeError):
      pass
  
  
  class APIConnectionError(StripeError):
      pass
  
  
  class CardError(StripeError):
  
      def __init__(self, message, param, code, http_body=None,
                   http_status=None, json_body=None, headers=None):
          super(CardError, self).__init__(
              message, http_body, http_status, json_body,
              headers)
          self.param = param
          self.code = code
  
  
  class InvalidRequestError(StripeError):
  
      def __init__(self, message, param, http_body=None,
                   http_status=None, json_body=None, headers=None):
          super(InvalidRequestError, self).__init__(
              message, http_body, http_status, json_body,
              headers)
          self.param = param
  
  
  class AuthenticationError(StripeError):
      pass
  
  
  class PermissionsError(StripeError):
      pass
  
  
  class RateLimitError(StripeError):
      pass
  
subject: fix whitespace