Process a list of `texts` in one process.

def _process_all_1(self, texts:Collection[str]) -> List[List[str]]:
        "Process a list of `texts` in one process."
        tok = self.tok_func(self.lang)
        if self.special_cases: tok.add_special_cases(self.special_cases)
        return [self.process_text(str(t), tok) for t in texts]