[libc-commits] [libc] [libc][docs] Document printf NULL handling for %s/%n (PR #180067)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google approved this pull request.

Looks good to me, thanks for this cleanup! Do you need me to merge this for you?

https://github.com/llvm/llvm-project/pull/180067