[Bug libstdc++/123409] negative_binomial_distribution::param() does not modify member gamma_distribution

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123409

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Infinity Integral from comment #8)
> I want to properly submit a patch but I do not know how to, can someone here
> help me do it pls?

Thanks for your interest in contributing. The info you need is documented at
https://gcc.gnu.org/contribute.html

An important part is generating a patch file as a diff against the current
sources, not just providing a complete copy of the patched file.