Format the message of the logger.

        You can rewrite this method to format your own message::

            class MyLogger(Logger):

                def message(self, level, *args):
                    msg = ' '.join(args)

                    if level == 'error':
                        return terminal.red(msg)
                    return msg

def message(self, level, *args):
        """
        Format the message of the logger.

        You can rewrite this method to format your own message::

            class MyLogger(Logger):

                def message(self, level, *args):
                    msg = ' '.join(args)

                    if level == 'error':
                        return terminal.red(msg)
                    return msg
        """

        msg = ' '.join((str(o) for o in args))
        if level not in ('start', 'end', 'debug', 'info', 'warn', 'error'):
            return msg
        return '%s: %s' % (level, msg)