fix: rules type & duplicate checking

        self._w2idx = W2IDX

        self.max_len = MAX_LEN

        self.pattern = re.compile(r'\s+')

        self.rules = [(re.compile('\s*'.join(r)), r) for r in rules]

        self.rules = {}

        for r in rules:

            if type(r) == str:

                self.rules[r] = re.compile('\s*'.join(r))

            else:

                raise ValueError("rules must to have only string values.")

    def get_spaced_sent(self, raw_sent):

        raw_sent_ = "«" + raw_sent + "»"

        return subs

    def apply_rules(self, spaced_sent):

        for rgx, word in self.rules:

        for word, rgx in self.rules.items():

            spaced_sent = rgx.sub(word, spaced_sent)

        return spaced_sent