rustdoc doesn't detect + warn about broken anchor links, unlike regular intra-doc links #137740
Description
Not sure what category this should be. This one is much more of a feature request, than a bug.
The term of what is meant by anchors is borrowed from here #62833 .
cargo-deadlinks https://github.com/deadlinks/cargo-deadlinks does detect these, but is somewhat unofficial and is not as convenient to use as the rustdoc / cargo doc .
