Combination of alt and many runs infinitely

```
const keyword = C.many1(C.notSpace);
const whitespace = S.spaces;

const lang = pipe(
keyword,
P.alt(() => whitespace)
);

const input = `hello world mickey mouse`;
const res = run(P.many(lang), input);
```

expectation: `['hello', ' ', 'word', ' ', 'mickey', ' ' ,'mouse']`
actual: runs forever...