Fix message.content
Fix message.content

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