Function called for ending of tags

def handle_endtag(self, tag):
        """Function called for ending of tags"""
        if tag.lower() in self.allowed_tag_whitelist:
            if tag.lower() in ['ul', 'ol']:
                self.previous_type_lists = self.previous_type_lists[:-1]
                if tag.lower() == 'ol':
                    self.nb = self.previous_nbs[-1]
                    self.previous_nbs = self.previous_nbs[:-1]
                # we must remove any non-relevant spacing and end of
                # line before
                self.result = self.result.rstrip()
                self.result += '\n' + self.line_quotation