prettyPrint() of automaton

[sunyixu]

the method prettyPrint() prints strings that are not actually recognized by the automaton because the transitions of it do not reach a final state.
Example:

HashSet<State> statesR = new HashSet<>();
        HashSet<Transition> deltaR = new HashSet<>();
        State q00 = new State("q0", true, false);
        State q1 = new State("q1", false, false);
        State q2 = new State("q2", false, false);
        State q3 = new State("q3", false, false);
        statesR.add(q00);
        statesR.add(q1);
        statesR.add(q2);
        statesR.add(q3);
        deltaR.add(new Transition(q00, q1, "b"));
        deltaR.add(new Transition(q1, q2, "u"));
        deltaR.add(new Transition(q2, q3, "g"));
        FA result = new FA(new Automaton(deltaR, statesR));
        System.out.println("result --> " + result); //--> bug
        result.minimize();
        System.out.println("result after minimization --> " + result); //--> ε

In the example above, the automaton has no final state.
The first println will print "bug" while it should print "ε" as the second call.