malachite::platform::Limb public?

[amamic1803]

I've seen you have used this in example code when you wrote a twos_complement_limbs_count function, however I don't see any mention of platform module in the docs or Limb type. Also following Limb link in docs doesn't lead to any concrete type. Should it be this way?

I probably don't need this for implementing integration with PyO3, but I can imagine it might be useful in some cases.

[mhogrefe]

Sorry for the very long delay. In 0.4.21 Malachite now re-exports the platform module. I haven't changed the links to point to the concrete Limb type yet; I'll keep this issue open until I do that.