[wwwdocs] Typo in description of __builtin_expect_with_probability

[Alexander Oblovatniy]

Hello,

I'd like to report a typo in description of
«__builtin_expect_with_probability»:
https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#Other-Builtins

The description starts with "The built-in has same semantics as
*__builtin_expect_with_probability*", but it seems like *__builtin_expect*
should be there.

Thanks!