old_contents: """Extension of flask.Response.
  """
  
  from flask import Response as ResponseBase, json, current_app, request
  
  
  class Response(ResponseBase):
      """Extend flask.Response with support for list/dict conversion to JSON."""
      def __init__(self, content=None, *args, **kargs):
          if isinstance(content, (list, dict)):
              kargs['mimetype'] = 'application/json'
              content = to_json(content)
  
          super(Response, self).__init__(content, *args, **kargs)
  
      @classmethod
      def force_type(cls, response, environ=None):
          """Override with support for list/dict."""
          if isinstance(response, (list, dict)):
              return cls(response)
          else:
              return super(Response, cls).force_type(response, environ)
  
  
  def to_json(content):
      """Converts content to json while respecting config options."""
      indent = None
      if (current_app.config['JSONIFY_PRETTYPRINT_REGULAR']
              and not request.is_xhr):
          indent = 2
      return json.dumps(content, indent=indent)
  
new_contents: """Extension of flask.Response.
  """
  
  from flask import Response as ResponseBase, json, current_app, request
  
  
  class Response(ResponseBase):
      """Extend flask.Response with support for list/dict conversion to JSON."""
      def __init__(self, content=None, *args, **kargs):
          if isinstance(content, (list, dict)):
              kargs['mimetype'] = 'application/json'
              content = to_json(content)
  
          super(Response, self).__init__(content, *args, **kargs)
  
      @classmethod
      def force_type(cls, response, environ=None):
          """Override with support for list/dict."""
          if isinstance(response, (list, dict)):
              return cls(response)
          else:
              return super(Response, cls).force_type(response, environ)
  
  
  def to_json(content):
      """Converts content to json while respecting config options."""
      indent = None
      separators = (',', ':')
  
      if (current_app.config['JSONIFY_PRETTYPRINT_REGULAR']
              and not request.is_xhr):
          indent = 2
          separators = (', ', ': ')
  
      return (json.dumps(content, indent=indent, separators=separators), '\n')
  
subject: Add explicit JSON separators and append newline to end of JSON string.