rustdoc: std::f32::consts (re-exported module) members are not documented

[SimonSapin]

http://doc.rust-lang.org/std/f32/consts/ and http://doc.rust-lang.org/std/f64/consts/ are currently empty, except for the module’s docstring. Compare with http://doc.rust-lang.org/core/f32/consts/ and http://doc.rust-lang.org/core/f64/consts/

[steveklabnik]

I don't know the best way to tackle this, as I know little about re-exported documentation. @huonw do you know?

[SimonSapin]

To clarify: I think this is a bug in rustdoc code rather than documentation that needs to be written.

[steveklabnik]

Agreed.

[tomjakubowski]

This is a dupe of #15821 (although that should be updated to reflect the static -> const split).

[tomjakubowski]

Not actually a dupe of #15821, my mistake.