Ref rust-lang#73921

Now that arrays implement `IntoIterator`, using
`&` is no longer necessary. This makes examples
easier to understand.

The `unsupported` type is imported two times, as `super::unsupported` and as `crate::sys::unsupported`, throwing an error. Remove `super::unsupported` in favor of the other.

add `track_path::path` fn for usage in `proc_macro`s

Adds a way to declare a dependency on external files without including them, to either re-trigger the build of a file as well as covering the use case of including dependencies within the `rustc` invocation, such that tools like `sccache`/`cachepot` are able to handle references to external files which are not included.

Ref rust-lang#73921

Merge `sys_common::bytestring` back into `os_str_bytes`

`bytestring` contains code for correctly debug formatting a byte slice (`[u8]`). This functionality is and has historically only been used to provide the debug formatting of byte-based os-strings (on unix etc.).

Having this functionality in the separate `bytestring` module was useful in the past to reduce duplication, as [when it was added](rust-lang#46798) `os_str_bytes` was still split into `sys::{unix, redox, wasi, etc.}::os_str`. However, now that is no longer the case, there is not much reason for the `bytestring` functionality to be separate from `os_str_bytes`; I don't think it is very likely that another part of std will need to handle formatting byte strings that are not os-strings in the future (everything should be `utf8`). This is why this PR merges the functionality of `bytestring` directly into the debug implementation in `os_str_bytes`.

Docs: clarify that certain intrinsics are not unsafe

As determined by the hardcoded list at https://github.com/rust-lang/rust/blob/003b8eadd7a476c51956fe447894532d6e21937e/compiler/rustc_typeck/src/check/intrinsic.rs#L59-L92

…vink

Add a regression test for issue-70703

Closes rust-lang#70703

…rom-command-args-calls, r=joshtriplett

Remove & from Command::args calls in documentation

Now that arrays implement `IntoIterator`, using `&` is no longer necessary. This makes examples easier to understand.

Fix double import in wasm thread

The `unsupported` type is imported two times, as `super::unsupported` and as `crate::sys::unsupported`, throwing an error. Remove `super::unsupported` in favor of the other.

As reported in rust-lang#86802.

Fix rust-lang#86802

… r=jackh726

Add a help message to `unused_doc_comments` lint

Fixes rust-lang#83492
This adds a help message to suggest a plain comment like the E0658 error. I've yet to come up with the best message about the doc attribute but the current shouldn't harm anything.
I was thinking of recovering in the `doc_comment_between_if_else` case, but I came to the conclusion that it unlikely happened and was an overkill.