std::f32 impl Float is duplicated

[mdinger]

std::f32 doc page has impl Float for f32 at the top and at the bottom.

• The bottom one seems to have more elements though it's not clear why.
• Their styling is the same so it's not obvious if they should mean 2 different things.

Something should change so either they don't look like misshapen clones or it's clear what they mean.

[nagisa]

Possibly a dupe of #21474

[mdinger]

Perhaps but this doesn't use globs as far as I can tell which is the requirement for that other bug.

[nagisa]

Ah right, one is core::num::Float and another is std::num::Float. Two distinct traits.

[mdinger]

I'm not sure what can be done here then. Since core is in general not recommended to be used, maybe external linking (from outside of core) to it should be opt-in, not opt out. Then these links would only appear where an author decides it's useful.