def log(level, data)
      tmp = Time.now.strftime(@time_format)
      tmp << " " << data
      super(level, tmp)
    end
def log(level, data)
      tmp = Time.now.strftime(@time_format)
      tmp << " " << data
      super(level, tmp)
    end
Same as BasicLog#initialize

 You can set the timestamp format through #time_format

 Same as BasicLog#log