docs: def XMPP_display(self,*arg):
      """ For XMPP Demo
          輸出到 XMPP 之樣式。
      """
  
      MA = ''
      for i in arg:
        MAs = '- MA%02s: %.2f %s(%s)\n' % (
          unicode(i),
          self.MA(i),
          self.MAC(i),
          unicode(self.MA_serial(i)[0])
        )
        MA = MA + MAs
  
      vol = '- Volume: %s %s(%s)' % (
        unicode(self.MAVOL(1)/1000),
        unicode(self.MACVOL(1)),
        unicode(self.MAVOL_serial(1)[0])
      )
  
      MAO = self.MAO(3,6)
  
      re = """%(stock_name)s %(stock_no)s
  %(stock_date)s: %(stock_price)s %(stock_range)s(%(range_per)+.2f%%)
  %(MA)s%(vol)s
  - MAO(3-6): %(MAO_v).2f %(MAO_c)s(%(MAO_times)s)
  - RABC: %(RABC)s""" % {
          'stock_name': unicode(self.stock_name),
          'stock_no': unicode(self.stock_no),
          'stock_date': unicode(self.data_date[-1]),
          'stock_price': unicode(self.raw_data[-1]),
          'stock_range': unicode(self.stock_range[-1]),
          'range_per': self.range_per,
          'MA': MA,
          'vol': vol,
          'MAO_v': MAO[0][1][-1],
          'MAO_c': unicode(MAO[1]),
          'MAO_times': unicode(MAO[0][0]),
          'RABC': self.RABC
        }
  
      return re