A :class:`configparser.RawConfigParser` object with :attr:`available_files` loaded.

def parser(self):
        """A :class:`configparser.RawConfigParser` object with :attr:`available_files` loaded."""
        parser = configparser.RawConfigParser()
        for filename in self.available_files:
            friendly_name = format_path(filename)
            logger.debug("Loading configuration file: %s", friendly_name)
            loaded_files = parser.read(filename)
            if len(loaded_files) == 0:
                self.report_issue("Failed to load configuration file! (%s)", friendly_name)
        logger.debug("Loaded %s from %s.",
                     pluralize(len(parser.sections()), "section"),
                     pluralize(len(self.available_files), "configuration file"))
        return parser