…ell, r=jyn514

rustdoc: Move `display_fn` struct inside `display_fn`

This makes it clear that it's an implementation detail of `display_fn`
and shouldn't be used elsewhere, and it enforces in the compiler that no
one else can use it.

r? `@GuillaumeGomez`

…ell, r=jyn514

rustdoc: Move `display_fn` struct inside `display_fn`

This makes it clear that it's an implementation detail of `display_fn`
and shouldn't be used elsewhere, and it enforces in the compiler that no
one else can use it.

r? ``@GuillaumeGomez``

…ell, r=jyn514

rustdoc: Move `display_fn` struct inside `display_fn`

This makes it clear that it's an implementation detail of `display_fn`
and shouldn't be used elsewhere, and it enforces in the compiler that no
one else can use it.

r? ```@GuillaumeGomez```

Rollup of 15 pull requests

Successful merges:

 - rust-lang#79554 (Generic associated types in trait paths)
 - rust-lang#80726 (relax adt unsizing requirements)
 - rust-lang#81307 (Handle `Span`s for byte and raw strings and add more detail )
 - rust-lang#81318 (rustdoc-json: Fix has_body)
 - rust-lang#81456 (Make remote-test-server easier to use with new targets)
 - rust-lang#81497 (rustdoc: Move `display_fn` struct inside `display_fn`)
 - rust-lang#81500 (Remove struct_type from union output)
 - rust-lang#81542 (Expose correct symlink API on WASI)
 - rust-lang#81676 (Add more information to the error code for 'crate not found')
 - rust-lang#81682 (Add additional bitset benchmarks)
 - rust-lang#81730 (Make `Allocator` object-safe)
 - rust-lang#81763 (Cleanup rustdoc pass descriptions a bit)
 - rust-lang#81767 (Update LayoutError/LayoutErr stability attributes)
 - rust-lang#81771 (Indicate change in RSS from start to end of pass in time-passes output)
 - rust-lang#81781 (Fix `install-awscli.sh` error in CI)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup