Broken link(s) in docs depending on features

On my system file:///volatile/rustcargo/Rustup/Arti/arti/target/doc/arti_client/index.html has this:

by calling [tor_rtcompat::async_std::current_runtime], which

i.e. a busted link.

This is probably only present when you're building the docs with --all-features. but ff you build docs without --all-features you get more non-link stuff and some compiler warnings about them....