…st, r=nagisa

suggest casting between i/u32 and char

As discussed in rust-lang#91063 , this adds a suggestion for converting between i32/u32 <-> char with `as`, and a short explanation for why this is safe

…macro, r=nagisa

Add a suggestion if `macro_rules` is misspelled

Fixes rust-lang#91227.

Make rustdoc headings black, and markdown blue

Demo:

https://rustdoc.crud.net/jsha/heading-color/std/string/index.html#structs
https://rustdoc.crud.net/jsha/heading-color/std/string/struct.String.html#examples

Fixes rust-lang#91304

r? ``@camelid`` /cc ``@GuillaumeGomez``

(Note: we may want to make rustdoc headings and markdown headings the same color -- rust-lang#90245 -- but we would want to do that intentionally; this is fixing up a change that did so accidentally)

Pretty print break and continue without redundant space

**Repro:**

```rust
macro_rules! m {
    ($e:expr) => { stringify!($e) };
}
fn main() {
    println!("{:?}", m!(loop { break; }));
    println!("{:?}", m!(loop { break 'a; }));
    println!("{:?}", m!(loop { break false; }));
}
```

**Before:**

- `"loop { break ; }"`
- `"loop { break 'a ; }"`
- `"loop { break false ; }"`

**After:**

- `"loop { break; }"`
- `"loop { break 'a; }"`
- `"loop { break false; }"`

<br>

Notice that `return` and `yield` already follow the same approach as this PR of printing the space *before* each additional piece following the keyword, rather than *after* each thing.

https://github.com/rust-lang/rust/blob/772d51f887fa407216860bf8ecf3f1a32fb795b4/compiler/rustc_ast_pretty/src/pprust/state.rs#L2148-L2154

https://github.com/rust-lang/rust/blob/772d51f887fa407216860bf8ecf3f1a32fb795b4/compiler/rustc_ast_pretty/src/pprust/state.rs#L2221-L2228

…static-morse

Add test for packed drops in generators

r? ``@ecstatic-morse``

update Miri

Fixes rust-lang#91649
r? ``@ghost``

… r=notriddle

Fix indent of itemTypes in search.js

It has been bugging me for quite some time now. Finally took the time to clean it up a bit.

r? ``@notriddle``