code: func (n *Netrc) AddMachine(name, login, password string) {
  	machine := n.Machine(name)
  	if machine == nil {
  		machine = &Machine{}
  		n.machines = append(n.machines, machine)
  	}
  	machine.Name = name
  	machine.tokens = []string{"machine ", name, "\n"}
  	machine.Set("login", login)
  	machine.Set("password", password)
  }
docs: // AddMachine adds a machine