code: func NewFmtMachineLogger() MachineLogger {
  	return &FmtMachineLogger{
  		outWriter: os.Stdout,
  		errWriter: os.Stderr,
  		debug:     false,
  		history:   NewHistoryRecorder(),
  	}
  }
docs: // NewFmtMachineLogger creates a MachineLogger implementation used by the drivers