Fix style issues and update diagnostic messages

Update src/librustc_passes/diagnostics.rs

Co-Authored-By: doctorn <me@nathancorbyn.com>

Deny nested `async fn` in Rust 2015 edition

Deny nested `async fn` in Rust 2015 edition

Deny nested `async fn` in Rust 2015 edition

* A number of `Stdio` related doc examples include running the "rev"
command to illustrate piping commands. The majority of these tests are
marked as `no_run` except for two tests which were not
* Not running these tests is unlikely to cause any negative impact, and
doing so also allows the test suite to pass in environments where the
"rev" command is unavailable

I wondered what the `<<!` operator is although the exclamation mark was
only the end of the sentence.

This is required at the very least in order to evaluate associated
constants for arrays (see rust-lang#58212).

Signed-off-by: Adonis <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/test/ui/macros/macro-at-most-once-rep-2015-ques-rep.stderr

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Update src/test/ui/macros/macro-at-most-once-rep-2015-ques-rep.stderr

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Stabilize split_ascii_whitespace

Tracking issue FCP to merge: rust-lang#48656 (comment)

fix stabilization order of uniform_paths.

hir: add HirId to main Hir nodes

Fix `std::os::fortanix_sgx::usercalls::raw::UsercallNrs`

Fixes fortanix/rust-sgx#88

Update src/libsyntax/ext/tt/quoted.rs

Co-Authored-By: asettouf <adonis.settouf@gmail.com>

Revert "Merge remote-tracking branch 'upstream/master'"

This reverts commit 751f05bd155e2c55d4177fe8211df634faf3a644, reversing
changes made to 545a3e62b0cb473108869a61b271bc589afb49da.

Fix for issue  rust-lang#58050

Hi,

a quick PR to mention in the compiler error message that `?` is a macro operator, as according to issue rust-lang#58050

It passed `python x.py test src/tools/tidy`  locally, as well as the recommendation to run `/x.py test src/test/ui --stage 1 --bless`.

Let me know if anything else is needed.

…isdreavus

rustdoc: move collapse and unindent docs passes earlier

Moves these passes as early as possible so later passes will see the same markdown that is passed to the test collector.

Fixes rust-lang#58473, and a similar issue with the private-doc-tests lint.

r? @QuietMisdreavus

…rochenkov

Make `visit_clobber` panic-safe.

Local measurements indicate the performance effect is negligible.

r? @petrochenkov

…n, r=varkor

Deny `async fn` in 2015 edition

This commit prevents code using `async fn` from being compiled in Rust 2015 edition.

Compiling code of the form:

```rust
async fn foo() {}
```

Will now result in the error:

```
error[E0670]: `async fn` is not permitted in the 2015 edition
 --> async.rs:1:1
  |
1 | async fn foo() {}
  | ^^^^^

error: aborting due to error

For more information about an error, try `rustc --explain E0670`.
```

This resolves rust-lang#58652 and also resolves rust-lang#53714.

r? @varkor

…crichton

Fix an indexing error when using `x.py help`

Fixes rust-lang#58640.

Fix copy-pasted typo for read_string return value

…richton

Update dlmalloc to 0.1.3

r? @alexcrichton

std: docs: Disable running several Stdio doctests

* A number of `Stdio` related doc examples include running the "rev"
command to illustrate piping commands. The majority of these tests are
marked as `no_run` except for two tests which were not
* Not running these tests is unlikely to cause any negative impact, and
doing so also allows the test suite to pass in environments where the
"rev" command is unavailable

update scoped_tls to 1.0

scoped_tls has been updated to version 1.0
This PR will hopefully merge flawlessly :)

This fixes, among others, alexcrichton/scoped-tls#9

Note, that the nightly feature has been removed in alexcrichton/scoped-tls@64bd7b8

Reduce Repetitions of (n << amt) >> amt

Fixes part of [rust-lang#49937](rust-lang#49937).

…, r=alexcrichton

Update string_cache_codegen to 0.4.2

This removes two dependencies of the old version (string_cache is already the latest version).

Clarify `rotate_{left,right}` docs

I wondered what the `<<!` operator is although the exclamation mark was
only the end of the sentence.

Normalize the type Self resolves to in an impl

This is required at the very least in order to evaluate associated
constants for arrays.

Fixes rust-lang#57796
Fixes rust-lang#58212.

r? @oli-obk
cc @hellow554

…wind, r=Centril

Add tracking issue for the unwind attribute

cc rust-lang#58760