old_contents: # coding: utf-8
  
  class DJOAuthException(Exception):
    """ Base exception class for all OAuth-related exceptions. """
    error_name = 'invalid_request'
    status_code = 400
  
  
  def get_error_details(exception):
    """ Return details about an OAuth excpetion.
  
    Returns a mapping with two keys, 'error' and 'error_description', which are
    used in all error responses described by the OAuth 2.0 specification. Read
    more at:
      * http://tools.ietf.org/html/rfc6749
      * http://tools.ietf.org/html/rfc6750
    """
    return {
      'error': getattr(exception, 'error_name', 'invalid_request'),
      'error_description': str(exception) or '(no description available)'
    }
  
  
  
new_contents: # coding: utf-8
  
  
  class DJOAuthException(Exception):
    """ Base exception class for all OAuth-related exceptions. """
    error_name = 'invalid_request'
    status_code = 400
  
  
  def get_error_details(exception):
    """ Return details about an OAuth excpetion.
  
    Returns a mapping with two keys, 'error' and 'error_description', which are
    used in all error responses described by the OAuth 2.0 specification. Read
    more at:
      * http://tools.ietf.org/html/rfc6749
      * http://tools.ietf.org/html/rfc6750
    """
    return {
      'error': getattr(exception, 'error_name', 'invalid_request'),
      'error_description': str(exception) or '(no description available)'
    }
  
  
  
subject: Add more whitespace.