Return the string to display in the curse interface.

def msg_curse(self, args=None, max_width=None):
        """Return the string to display in the curse interface."""
        # Init the return message
        ret = []

        if not self.stats or self.stats == {} or self.is_disable():
            return ret

        # Generate the output
        if 'instance-type' in self.stats \
           and 'instance-id' in self.stats \
           and 'region' in self.stats:
            msg = 'Cloud '
            ret.append(self.curse_add_line(msg, "TITLE"))
            msg = '{} instance {} ({})'.format(self.stats['instance-type'],
                                               self.stats['instance-id'],
                                               self.stats['region'])
            ret.append(self.curse_add_line(msg))

        # Return the message with decoration
        # logger.info(ret)
        return ret