…me in run_cargo

Metadata::modified works in all platforms supported by the filetime
crate. This changes brings rustbuild a tiny bit closer towards dropping
the filetime dependency.

Co-authored-by: lcnr <rust@lcnr.de>

Some improvements to the async docs

The goal here is to make the docs overall a little bit more comprehensive and add more links between the things.

One thing that's not working yet is the links to the keywords. Somehow I couldn't get them to work.

r? ````@GuillaumeGomez```` do you know how I could get the keyword links to work?

rustc_const_eval: adopt let else in more places

Continuation of rust-lang#89933, rust-lang#91018, rust-lang#91481, rust-lang#93046, rust-lang#93590, rust-lang#94011.

I have extended my clippy lint to also recognize tuple passing and match statements. The diff caused by fixing it is way above 1 thousand lines. Thus, I split it up into multiple pull requests to make reviewing easier. This PR handles rustc_const_eval.

Gracefully handle non-UTF-8 string slices when pretty printing

Fixes rust-lang#78520.

Update pin_static_ref stabilization version.

rust-lang#93580 slipped into 1.61

cc `@m-ou-se`

…RalfJung

Implement LowerHex on Scalar to clean up their display in rustdoc

Follow-up of rust-lang#94091.

r? ````@RalfJung````

…crum

Use Metadata::modified instead of FileTime::from_last_modification_ti…

…me in run_cargo

Metadata::modified works in all platforms supported by the filetime
crate. This changes brings rustbuild a tiny bit closer towards dropping
the filetime dependency.

CTFE engine: Scalar: expose size-generic to_(u)int methods

This matches the size-generic constructors `Scalar::from_(u)int`, and it would have helped in rust-lang/miri#1978.

r? `@oli-obk`

… r=matthewjasper

Better error if the user tries to do assignment ... else

If the user tries to do assignment ... else, we now issue a more comprehensible error in the parser.

closes rust-lang#93995

trait system: comments and small nonfunctional changes

r? `@nikomatsakis` because of the leak-check check removal

…Amanieu

Correctly handle miniz_oxide extern crate declaration

Fixes rust-lang#94219.

Follow-up of rust-lang#94122.

The `miniz_oxide` dependency is optional and therefore should allow be "imported" when it makes sense.

r? `@ivmarkov`