…ement, r=fmease

Fixes footnote handling in rustdoc

Fixes rust-lang#100638.

You can now declare footnotes like this:

```rust
//! Reference to footnotes A[^1], B[^2] and C[^3].
//!
//! [^1]: Footnote A.
//! [^2]: Footnote B.
//! [^3]: Footnote C.
```

r? `@notriddle`

…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#116677 (References refer to allocated objects)
 - rust-lang#118533 (Suppress unhelpful diagnostics for unresolved top level attributes)
 - rust-lang#119991 (Reject infinitely-sized reads from io::Repeat)
 - rust-lang#120232 (Add support for custom JSON targets when using build-std.)
 - rust-lang#120358 (Bump Fuchsia, build tests, and use 8 core bots)
 - rust-lang#120424 (raw pointer metadata API: data address -> data pointer)
 - rust-lang#120434 (Revert outdated version of "Add the wasm32-wasi-preview2 target")
 - rust-lang#120443 (Fixes footnote handling in rustdoc)

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

…ement, r=fmease

Fixes footnote handling in rustdoc

Fixes rust-lang#100638.

You can now declare footnotes like this:

```rust
//! Reference to footnotes A[^1], B[^2] and C[^3].
//!
//! [^1]: Footnote A.
//! [^2]: Footnote B.
//! [^3]: Footnote C.
```

r? ``@notriddle``

Rollup of 10 pull requests

Successful merges:

 - rust-lang#116677 (References refer to allocated objects)
 - rust-lang#119991 (Reject infinitely-sized reads from io::Repeat)
 - rust-lang#120266 (Improve documentation for [A]Rc::into_inner)
 - rust-lang#120376 (Update codegen test for LLVM 18)
 - rust-lang#120402 (Make the coroutine def id of an async closure the child of the closure def id)
 - rust-lang#120424 (raw pointer metadata API: data address -> data pointer)
 - rust-lang#120425 (Remove unnecessary unit returns in query declarations)
 - rust-lang#120428 (hir: Two preparatory changes for rust-lang#120206)
 - rust-lang#120434 (Revert outdated version of "Add the wasm32-wasi-preview2 target")
 - rust-lang#120443 (Fixes footnote handling in rustdoc)

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

…llaumeGomez

Rollup of 18 pull requests

Successful merges:

 - rust-lang#119123 (Add triagebot mentions entry for simd intrinsics)
 - rust-lang#119991 (Reject infinitely-sized reads from io::Repeat)
 - rust-lang#120172 (bootstrap: add more unit tests)
 - rust-lang#120250 (rustdoc: Prevent JS injection from localStorage)
 - rust-lang#120376 (Update codegen test for LLVM 18)
 - rust-lang#120387 (interpret/memory: fix safety comment for large array memset optimization)
 - rust-lang#120400 (Bound errors span label cleanup)
 - rust-lang#120402 (Make the coroutine def id of an async closure the child of the closure def id)
 - rust-lang#120403 (Add instructions of how to use pre-vendored 'rustc-src')
 - rust-lang#120424 (raw pointer metadata API: data address -> data pointer)
 - rust-lang#120425 (Remove unnecessary unit returns in query declarations)
 - rust-lang#120439 (Move UI issue tests to subdirectories)
 - rust-lang#120443 (Fixes footnote handling in rustdoc)
 - rust-lang#120452 (std: Update documentation of seek_write on Windows)
 - rust-lang#120460 (Be more careful about interpreting a label/lifetime as a mistyped char literal.)
 - rust-lang#120464 (Add matthewjasper to some review groups)
 - rust-lang#120467 (Update books)
 - rust-lang#120488 (Diagnostic lifetimes cleanups)

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

Rollup merge of rust-lang#120443 - GuillaumeGomez:footnote-def-improvement, r=fmease

Fixes footnote handling in rustdoc

Fixes rust-lang#100638.

You can now declare footnotes like this:

```rust
//! Reference to footnotes A[^1], B[^2] and C[^3].
//!
//! [^1]: Footnote A.
//! [^2]: Footnote B.
//! [^3]: Footnote C.
```

r? `@notriddle`