[pcre-dev] Typo about (?^)

PCRE docs say:

> If the first character following (? is a circumflex, it causes all of
> the above options to be unset. > Thus, (?^) is equivalent to (?-imnsx).


There is "xx" option. So may be docs have a typo?

- "all of the above options" -> "all of the above options but xx"
- or "(?^) is equivalent to (?-imnsx)" -> "(?^) is equivalent to
(?-imnsxxx)"