few states and nonterminals names fix

lib/grammars.py

@@ -97,7 +97,7 @@ class RegGrammar:
     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:

lib/reg.py

@@ -51,7 +51,7 @@ class NFA(NFA):
                     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)

lib/regex.py

@@ -86,8 +86,8 @@ class RegEx:
         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}