…orts.

This helper is in line with other other allocation helpers on Arc.

Added Arc::try_pin

This helper is in line with other other allocation helpers on Arc.

I didn't think this would require an RFC or broader discussion, let me know if that's incorrect.

Add -Zfuture-incompat-test to assist with testing future-incompat reports.

This adds a `-Zfuture-incompat-test` cli flag to assist with testing future-incompatible reports. This flag causes all lints to be treated as a future-incompatible lint, and will emit a report for them. This is being added so that Cargo's testsuite can reliably test the reporting infrastructure.  Right now, Cargo relies on using array_into_iter as a test subject. Since the breaking "future incompatible" lints are never intended to last forever, this means Cargo's testsuite would always need to keep changing to choose different lints (for example, rust-lang#86330 proposed dropping that moniker for array_into_iter). With this flag, Cargo's tests can trigger any lint and check for the report.

…, r=yaahc

Move assert_matches to an inner module

Fixes rust-lang#82913

… r=dtolnay

Add tracking issue number to `wasi_ext`

Feature `wasi_ext` is tracked by rust-lang#71213 but is was not in the source code.

…cottmcm

Add safety comments in private core::slice::rotate::ptr_rotate function

Helps with rust-lang#66219.

```@rustbot``` label C-cleanup T-compiler T-libs

Make SelfInTyParamDefault wording not be specific to type defaults

r? ```@lcnr```

Update cargo

13 commits in 3ebb5f15a940810f250b68821149387af583a79e..66a6737a0c9f3a974af2dd032a65d3e409c77aac
2021-07-02 20:35:38 +0000 to 2021-07-14 20:54:28 +0000
- Add format option to `cargo tree` to print the lib_name (rust-lang/cargo#9663)
- Prefer patched versions of dependencies (rust-lang/cargo#9639)
- When a dependency does not have a version, git or path, fails directly (rust-lang/cargo#9686)
- Spot the crate typo easily (rust-lang/cargo#9665)
- remove unnecessary 'collect' (rust-lang/cargo#9616)
- Make it easier to run testsuite with a custom toolchain. (rust-lang/cargo#9679)
- Serialize `cargo fix` (rust-lang/cargo#9677)
- Don't recommend filing issues on rust-lang/cargo for Cargo.toml errors. (rust-lang/cargo#9658)
- Update nightly failure notification. (rust-lang/cargo#9657)
- Update Windows env uppercase key check. (rust-lang/cargo#9654)
- Unignore fix_edition_2021. (rust-lang/cargo#9662)
- Warning when using features in patch (rust-lang/cargo#9666)
- Unify cargo and rustc's error reporting (rust-lang/cargo#9655)

Fix misuse of rev attribute on <a> tag

The `rev` attribute is supposed to talk about "ownership" as far as I could found out. This attribute seems not very well defined in the HTML spec and its usage in rustdoc is suboptimal.

It was found out in rust-lang#87149.

r? `@JohnTitor`