http://blog.youkuaiyun.com/songjinshi/article/details/7868866
回车、换行、空格的ASCII码值
回车,ASCII码13换行,ASCII码10
空格,ASCII码32
Return = CR = 13 = '\x0d'
NewLine = LF = 10 = '\x0a'
http://blog.youkuaiyun.com/songjinshi/article/details/7868866

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