Code improve of ``@werobot.filter``
Code improve of ``@werobot.filter``

one-leaf/WeRoBot,FlyRabbit/WeRoBot,Zeacone/WeRoBot,Infixz/WeRoBot,kmalloc/WeRoBot,adam139/WeRobot,whtsky/WeRoBot,weberwang/WeRoBot,FlyRabbit/WeRoBot,whtsky/WeRoBot,tdautc19841202/WeRoBot,whtsky/WeRoBot,adrianzhang/WeRoBot,chenjiancan/WeRoBot,weberwang/WeRoBot,notwin/WeRoBot,adam139/WeRobot,Zhenghaotao/WeRoBot