few states and nonterminals names fix

    def eliminate_useless(self) -> RegGrammar:

        grammar = deepcopy(self)

        helper = Nonterminal("helper_nonterminal")

        helper = Nonterminal("<helpernonterminal>")

        previous: Set[Nonterminal] = set()

        actual: Set[Nonterminal] = {helper}

        while previous != actual:

                    rules[nonterminal1].add(terminal)

        if self.init in self.final:

            new_init = Nonterminal("new_init")

            new_init = Nonterminal("<newinit>")

            rules[new_init] = {Eps()}

            for rule in rules[init]:

                rules[new_init].add(rule)

        self.expression = expression

    def regex_to_efa(self) -> NFA:

        init = State("init")

        final = State("final")

        init = State("init_state")

        final = State("final_state")

        states: Set[State] = {init, final}

        transition: Dict[Tuple[State, AST], Set[State]] = dict()

        transition[init, self.expression] = {final}