Per [RFC 3309](https://rust-lang.github.io/rfcs/3309-style-team.html).

Co-authored-by: Nathan Stocks <cleancut@github.com>
Co-authored-by: rdvdev2 <rdvdev2@gmail.com>

…son error

Add `Noted` marker struct that implements `EmissionGuarantee` so that
`emit_note` and `create_note` can be implemented for struct diagnostics.

Signed-off-by: David Wood <david.wood@huawei.com>

…rror

…artwright

Move style guide to rust-lang/rust

Per [RFC 3309](https://rust-lang.github.io/rfcs/3309-style-team.html).

Panic for invalid arguments of `{integer primitive}::ilog{,2,10}` in all modes

Decision made in rust-lang#100422 (comment)

resolves rust-lang#100422

tracking issue: rust-lang#70887

r? `@m-ou-se`

Use memset to initialize readbuf

The write loop was found to be slow in rust-lang#102727

The proper fix is in rust-lang#102760 but this might still help debug builds and code running under miri by using the write_bytes intrinsic instead of writing one byte at a time.

…ity, r=cjgillot

Check representability in adt_sized_constraint

Now that representability is a query, we can use it to preemptively avoid a cycle in `adt_sized_constraint`.

I moved the representability check into `check_mod_type_wf` to avoid a scenario where rustc quits before checking all the types for representability. This also removes the check from rustdoc, which is alright AFAIK.

r? ``@cjgillot``

…piler-errors

unify `IsPattern` and `IsImport` enum in `show_candidates`

Follow-up of rust-lang#102876
A binding cannot appear in both pattern and import at the same time, so it makes sense to unify them
r? `@compiler-errors`

…lass, r=GuillaumeGomez

rustdoc: remove unused classes from sidebar links

Since rust-lang@98f05a0 removed separate colors from the currently-selected item, there's no need to have item classes on sidebar links.

Preview: https://notriddle.com/notriddle-rustdoc-demos/sidebar-link-class/std/vec/struct.Vec.html

While cleaning up the CSS to remove unneeded `.content` selectors, this PR changes the `h1.fqn a` CSS selector to just be `h1 a`, so that the header link color selector is less specific than the typed link at the end. Since rust-lang#89506 made docblocks start at `h2`, the main page link header should be the only h1 in the page now.