some typo fixes and suggested revisions (#681)
some typo fixes and suggested revisions (#681)


binsee/wechaty,mukaiu/wechaty,binsee/wechaty,mukaiu/wechaty,wechaty/wechaty,binsee/wechaty,lijiarui/wechaty,Chatie/wechaty,zixia/wechaty,zixia/wechaty,lijiarui/wechaty,wechaty/wechaty,Chatie/wechaty,wechaty/wechaty,Chatie/wechaty,mukaiu/wechaty