Instead of using AST pretty printing.

This is a step towards removing `token::Interpolated`, which will
eventually (in rust-lang#124141) be replaced with a token stream within invisible
delimiters.

This changes (improves) the output of the `stringify!` macro in some
cases. This is allowed. As the `stringify!` docs say: "Note that the
expanded results of the input tokens may change in the future. You
should be careful if you rely on the output."

Test changes:

- tests/ui/macros/stringify.rs: this used to test both token stream
  pretty printing and AST pretty printing via different ways of invoking
  of `stringify!` (i.e. `$expr` vs `$tt`). But those two different
  invocations now give the same result, which is a nice consistency
  improvement. This removes the need for the `c2!` macro.

- tests/ui/macros/trace_faulty_macros.rs: there is some sub-optimal
  spacing in the printing of `A { a : a, b : 0, c : _, .. }`, which will
  be fixed in the next commit. The spacing of `1+1` improves -- it now
  matches the formatting in the source code.

- tests/ui/proc-macro/*: minor improvements where small differences
  between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)`
  output disappear.

…, r=<try>

Print `token::Interpolated` with token stream pretty printing.

This is a step towards removing `token::Interpolated` (rust-lang#124141). It unavoidably changes the output of the `stringify!` macro, generally for the better.

r? `@petrochenkov`

Add tests for `-Zunpretty=expanded` ported from stringify's tests

This PR adds a new set of tests for the AST pretty-printer.

Previously, pretty-printer edge cases were tested by way of `stringify!` in [tests/ui/macros/stringify.rs](https://github.com/rust-lang/rust/blob/1.78.0/tests/ui/macros/stringify.rs), such as the tests added by rust-lang@419b269 and rust-lang@527e2ea.

Those tests will no longer provide effective coverage of the AST pretty-printer after rust-lang#124141. `Nonterminal` and `TokenKind::Interpolated` are being removed, and a consequence is that `stringify!` will perform token stream pretty printing, instead of AST pretty printing, in all of the `stringify!` cases including $:expr and all other interpolations.

This PR adds 2 new ui tests with `compile-flags: -Zunpretty=expanded`:

- **tests/ui/unpretty/expanded-exhaustive.rs** — this test aims for exhaustive coverage of all the variants of `ExprKind`, `ItemKind`, `PatKind`, `StmtKind`, `TyKind`, and `VisibilityKind`. Some parts could use being fleshed out further, but the current state is roughly on par with what exists in the old stringify-based tests.

- **tests/ui/unpretty/expanded-interpolation.rs** — this test covers tricky macro metavariable edge cases that require the AST pretty printer to synthesize parentheses in order for the printed code to be valid Rust syntax.

r? `@nnethercote`

Rollup merge of rust-lang#125236 - dtolnay:expandtest, r=nnethercote

Add tests for `-Zunpretty=expanded` ported from stringify's tests

This PR adds a new set of tests for the AST pretty-printer.

Previously, pretty-printer edge cases were tested by way of `stringify!` in [tests/ui/macros/stringify.rs](https://github.com/rust-lang/rust/blob/1.78.0/tests/ui/macros/stringify.rs), such as the tests added by rust-lang@419b269 and rust-lang@527e2ea.

Those tests will no longer provide effective coverage of the AST pretty-printer after rust-lang#124141. `Nonterminal` and `TokenKind::Interpolated` are being removed, and a consequence is that `stringify!` will perform token stream pretty printing, instead of AST pretty printing, in all of the `stringify!` cases including $:expr and all other interpolations.

This PR adds 2 new ui tests with `compile-flags: -Zunpretty=expanded`:

- **tests/ui/unpretty/expanded-exhaustive.rs** — this test aims for exhaustive coverage of all the variants of `ExprKind`, `ItemKind`, `PatKind`, `StmtKind`, `TyKind`, and `VisibilityKind`. Some parts could use being fleshed out further, but the current state is roughly on par with what exists in the old stringify-based tests.

- **tests/ui/unpretty/expanded-interpolation.rs** — this test covers tricky macro metavariable edge cases that require the AST pretty printer to synthesize parentheses in order for the printed code to be valid Rust syntax.

r? `@nnethercote`

Instead of using AST pretty printing.

This is a step towards removing `token::Interpolated`, which will
eventually (in rust-lang#124141) be replaced with a token stream within invisible
delimiters.

This changes (improves) the output of the `stringify!` macro in some
cases. This is allowed. As the `stringify!` docs say: "Note that the
expanded results of the input tokens may change in the future. You
should be careful if you rely on the output."

Test changes:

- tests/ui/macros/stringify.rs: this used to test both token stream
  pretty printing and AST pretty printing via different ways of invoking
  of `stringify!` (i.e. `$expr` vs `$tt`). But those two different
  invocations now give the same result, which is a nice consistency
  improvement. This removes the need for all the `c2*` macros. The AST
  pretty printer now has more thorough testing thanks to rust-lang#125236.

- tests/ui/proc-macro/*: minor improvements where small differences
  between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)`
  output disappear.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

ast: Remove token visiting from AST visitor

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

r? `@nnethercote`

Rollup merge of rust-lang#140450 - petrochenkov:vistok, r=nnethercote

ast: Remove token visiting from AST visitor

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

r? `@nnethercote`

…olated_BETA, r=nnethercote

[beta] [also fit for beta rollup] [HOTFIX] Don't delay a bug on malformed meta items involving interpolated tokens

Directly fixes rust-lang#140612.

<details><summary>Outdated Information</summary>

Directly fixes the 3 crater regressions reported in rust-lang#137687 (comment) (NB: The containing issue rust-lang#137687 is in fact *not* an instance of these regressions, see rust-lang#137687 (comment)).

</details>

**Why is this a separate PR for `beta`**? Well, the crater regressions were already fixed on master albeit unintentionally so, namely by PR rust-lang#124141 which we **certainly** don't want to backport! So this is simply a hotfix. PR rust-lang#140584 will then provide the regression test for master, too, so it doesn't get 'lost'.

[`@]T-release,` if/once accepted by T-compiler, this PR will be fit for beta rollup and can be cherry-picked.

<details><summary>Slightly Outdated & Irrelevant Information</summary>

FYI, we may also want to (separately) backport PR rust-lang#140584 to [fix] rust-lang#137687 (which, again, is not an instance of the crater regressions) but it's unclear if it's really necessary (since it's fuzzer-generated and I don't know of any real users who are impacted).

</details>

cc `@jdonszelmann`
r? fmease

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [rust](https://github.com/rust-lang/rust) | minor | `1.86.0` -> `1.87.0` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

---

### Release Notes

<details>
<summary>rust-lang/rust (rust)</summary>

### [`v1.87.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1870-2025-05-15)

[Compare Source](rust-lang/rust@1.86.0...1.87.0)

\==========================

<a id="1.87.0-Language"></a>

## Language

-   [Stabilize `asm_goto` feature](rust-lang/rust#133870)
-   [Allow parsing open beginning ranges (`..EXPR`) after unary operators `!`, `-`, and `*`](rust-lang/rust#134900).
-   [Don't require method impls for methods with `Self: Sized` bounds in `impl`s for unsized types](rust-lang/rust#135480)
-   [Stabilize `feature(precise_capturing_in_traits)` allowing `use<...>` bounds on return position `impl Trait` in `trait`s](rust-lang/rust#138128)

<a id="1.87.0-Compiler"></a>

## Compiler

-   [x86: make SSE2 required for i686 targets and use it to pass SIMD types](rust-lang/rust#135408)

<a id="1.87.0-Platform-Support"></a>

## Platform Support

-   [Remove `i586-pc-windows-msvc` target](rust-lang/rust#137957)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html

<a id="1.87.0-Libraries"></a>

## Libraries

-   [Stabilize the anonymous pipe API](rust-lang/rust#127154)
-   [Add support for unbounded left/right shift operations](rust-lang/rust#129375)
-   [Print pointer metadata in `Debug` impl of raw pointers](rust-lang/rust#135080)
-   [`Vec::with_capacity` guarantees it allocates with the amount requested, even if `Vec::capacity` returns a different number.](rust-lang/rust#135933)
-   Most `std::arch` intrinsics which don't take pointer arguments can now be called from safe code if the caller has the appropriate target features already enabled (rust-lang/stdarch#1714, rust-lang/stdarch#1716, rust-lang/stdarch#1717)
-   [Undeprecate `env::home_dir`](rust-lang/rust#137327)
-   [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449)
-   [Macros such as `assert_eq!` and `vec!` now support `const {...}` expressions](rust-lang/rust#138162)

<a id="1.87.0-Stabilized-APIs"></a>

## Stabilized APIs

-   [`Vec::extract_if`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.extract_if)
-   [`vec::ExtractIf`](https://doc.rust-lang.org/stable/std/vec/struct.ExtractIf.html)
-   [`LinkedList::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.LinkedList.html#method.extract_if)
-   [`linked_list::ExtractIf`](https://doc.rust-lang.org/stable/std/collections/linked_list/struct.ExtractIf.html)
-   [`<[T]>::split_off`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off)
-   [`<[T]>::split_off_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_mut)
-   [`<[T]>::split_off_first`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first)
-   [`<[T]>::split_off_first_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first_mut)
-   [`<[T]>::split_off_last`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last)
-   [`<[T]>::split_off_last_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last_mut)
-   [`String::extend_from_within`](https://doc.rust-lang.org/stable/alloc/string/struct.String.html#method.extend_from_within)
-   [`os_str::Display`](https://doc.rust-lang.org/stable/std/ffi/os_str/struct.Display.html)
-   [`OsString::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.display)
-   [`OsStr::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsStr.html#method.display)
-   [`io::pipe`](https://doc.rust-lang.org/stable/std/io/fn.pipe.html)
-   [`io::PipeReader`](https://doc.rust-lang.org/stable/std/io/struct.PipeReader.html)
-   [`io::PipeWriter`](https://doc.rust-lang.org/stable/std/io/struct.PipeWriter.html)
-   [`impl From<PipeReader> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeReader%3E-for-OwnedHandle)
-   [`impl From<PipeWriter> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeWriter%3E-for-OwnedHandle)
-   [`impl From<PipeReader> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html)
-   [`impl From<PipeWriter> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html#impl-From%3CPipeWriter%3E-for-Stdio)
-   [`impl From<PipeReader> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeReader%3E-for-OwnedFd)
-   [`impl From<PipeWriter> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeWriter%3E-for-OwnedFd)
-   [`Box<MaybeUninit<T>>::write`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.write)
-   [`impl TryFrom<Vec<u8>> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-TryFrom%3CVec%3Cu8%3E%3E-for-String)
-   [`<*const T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned)
-   [`<*const T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned)
-   [`<*mut T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned-1)
-   [`<*mut T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned-1)
-   [`NonNull::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.offset_from_unsigned)
-   [`NonNull::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.byte_offset_from_unsigned)
-   [`<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.cast_signed)
-   [`NonZero::<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_signed-5).
-   [`<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.cast_unsigned).
-   [`NonZero::<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_unsigned-5).
-   [`<uN>::is_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.is_multiple_of)
-   [`<uN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shl)
-   [`<uN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shr)
-   [`<iN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shl)
-   [`<iN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shr)
-   [`<iN>::midpoint`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.midpoint)
-   [`<str>::from_utf8`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8)
-   [`<str>::from_utf8_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_mut)
-   [`<str>::from_utf8_unchecked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked)
-   [`<str>::from_utf8_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked_mut)

These previously stable APIs are now stable in const contexts:

-   [`core::str::from_utf8_mut`](https://doc.rust-lang.org/stable/std/str/fn.from_utf8\_mut.html)
-   [`<[T]>::copy_from_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.copy_from_slice)
-   [`SocketAddr::set_ip`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_ip)
-   [`SocketAddr::set_port`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_port),
-   [`SocketAddrV4::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_ip)
-   [`SocketAddrV4::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_port),
-   [`SocketAddrV6::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_ip)
-   [`SocketAddrV6::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_port)
-   [`SocketAddrV6::set_flowinfo`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_flowinfo)
-   [`SocketAddrV6::set_scope_id`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_scope_id)
-   [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit)
-   [`char::is_whitespace`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_whitespace)
-   [`<[[T; N]]>::as_flattened`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened)
-   [`<[[T; N]]>::as_flattened_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened_mut)
-   [`String::into_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_bytes)
-   [`String::as_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_str)
-   [`String::capacity`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.capacity)
-   [`String::as_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_bytes)
-   [`String::len`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.len)
-   [`String::is_empty`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.is_empty)
-   [`String::as_mut_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_str)
-   [`String::as_mut_vec`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_vec)
-   [`Vec::as_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_ptr)
-   [`Vec::as_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_slice)
-   [`Vec::capacity`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.capacity)
-   [`Vec::len`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.len)
-   [`Vec::is_empty`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.is_empty)
-   [`Vec::as_mut_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_slice)
-   [`Vec::as_mut_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_ptr)

<a id="1.87.0-Cargo"></a>

## Cargo

-   [Add terminal integration via ANSI OSC 9;4 sequences](rust-lang/cargo#14615)
-   [chore: bump openssl to v3](rust-lang/cargo#15232)
-   [feat(package): add --exclude-lockfile flag](rust-lang/cargo#15234)

<a id="1.87.0-Compatibility-Notes"></a>

## Compatibility Notes

-   [Rust now raises an error for macro invocations inside the `#![crate_name]` attribute](rust-lang/rust#127581)
-   [Unstable fields are now always considered to be inhabited](rust-lang/rust#133889)
-   [Macro arguments of unary operators followed by open beginning ranges may now be matched differently](rust-lang/rust#134900)
-   [Make `Debug` impl of raw pointers print metadata if present](rust-lang/rust#135080)
-   [Warn against function pointers using unsupported ABI strings in dependencies](rust-lang/rust#135767)
-   [Associated types on `dyn` types are no longer deduplicated](rust-lang/rust#136458)
-   [Forbid attributes on `..` inside of struct patterns (`let Struct { #[attribute] .. }) =`](rust-lang/rust#136490)
-   [Make `ptr_cast_add_auto_to_object` lint into hard error](rust-lang/rust#136764)
-   Many `std::arch` intrinsics are now safe to call in some contexts, there may now be new `unused_unsafe` warnings in existing codebases.
-   [Limit `width` and `precision` formatting options to 16 bits on all targets](rust-lang/rust#136932)
-   [Turn order dependent trait objects future incompat warning into a hard error](rust-lang/rust#136968)
-   [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449)
-   [Windows: The standard library no longer links `advapi32`, except on win7.](rust-lang/rust#138233) Code such as C libraries that were relying on this assumption may need to explicitly link advapi32.
-   [Proc macros can no longer observe expanded `cfg(true)` attributes.](rust-lang/rust#138844)
-   [Start changing the internal representation of pasted tokens](rust-lang/rust#124141). Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a `tt` fragment specifier can often fix these macros.
-   [Don't allow flattened format_args in const.](rust-lang/rust#139624)

<a id="1.87.0-Internal-Changes"></a>

## Internal Changes

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

-   [Update to LLVM 20](rust-lang/rust#135763)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this MR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box

---

This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MC4xMS4xOSIsInVwZGF0ZWRJblZlciI6IjQwLjExLjE5IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJSZW5vdmF0ZSBCb3QiXX0=-->

Pkgsrc changes:
 * patches adjustments to adapt to upstream changes & new versions
   of included crates
 * associated checksums++

Upstream changes relative to 1.86.0:

Version 1.87.0 (2025-05-15)
==========================

Language
--------
- [Stabilize `asm_goto` feature]
  (rust-lang/rust#133870)
- [Allow parsing open beginning ranges (`..EXPR`) after unary
  operators `!`, `~`, `-`, and `*`}]
  (rust-lang/rust#134900).
- [Don't require method impls for methods with `Self: Sized` bounds
  in `impl`s for unsized types]
  (rust-lang/rust#135480)
- [Stabilize `feature(precise_capturing_in_traits)` allowing
  `use<...>` bounds on return position `impl Trait` in `trait`s]
  (rust-lang/rust#138128)

Compiler
--------
- [x86: make SSE2 required for i686 targets and use it to pass SIMD types]
  (rust-lang/rust#135408)

Platform Support
----------------
- [Remove `i586-pc-windows-msvc` target]
  (rust-lang/rust#137957)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html

Libraries
---------
- [Stabilize the anonymous pipe API]
  (rust-lang/rust#127154)
- [Add support for unbounded left/right shift operations]
  (rust-lang/rust#129375)
- [Print pointer metadata in `Debug` impl of raw pointers]
  (rust-lang/rust#135080)
- [`Vec::with_capacity` guarantees it allocates with the amount
  requested, even if `Vec::capacity` returns a different number.]
  (rust-lang/rust#135933)
- Most `std::arch` intrinsics which don't take pointer arguments
  can now be called from safe code if the caller has the appropriate
  target features already enabled
  (rust-lang/stdarch#1714,
  rust-lang/stdarch#1716,
  rust-lang/stdarch#1717)
- [Undeprecate `env::home_dir`]
  (rust-lang/rust#137327)
- [Denote `ControlFlow` as `#[must_use]`]
  (rust-lang/rust#137449)
- [Macros such as `assert_eq!` and `vec!` now support `const {...}` expressions]
  (rust-lang/rust#138162)

Stabilized APIs
---------------

- [`Vec::extract_if`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.extract_if)
- [`vec::ExtractIf`]
  (https://doc.rust-lang.org/stable/std/vec/struct.ExtractIf.html)
- [`LinkedList::extract_if`]
  (https://doc.rust-lang.org/stable/std/collections/struct.LinkedList.html#method.extract_if)
- [`linked_list::ExtractIf`]
  (https://doc.rust-lang.org/stable/std/collections/linked_list/struct.ExtractIf.html)
- [`<[T]>::split_off`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off)
- [`<[T]>::split_off_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_mut)
- [`<[T]>::split_off_first`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first)
- [`<[T]>::split_off_first_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first_mut)
- [`<[T]>::split_off_last`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last)
- [`<[T]>::split_off_last_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last_mut)
- [`String::extend_from_within`]
  (https://doc.rust-lang.org/stable/alloc/string/struct.String.html#method.extend_from_within)
- [`os_str::Display`]
  (https://doc.rust-lang.org/stable/std/ffi/os_str/struct.Display.html)
- [`OsString::display`]
  (https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.display)
- [`OsStr::display`]
  (https://doc.rust-lang.org/stable/std/ffi/struct.OsStr.html#method.display)
- [`io::pipe`]
  (https://doc.rust-lang.org/stable/std/io/fn.pipe.html)
- [`io::PipeReader`]
  (https://doc.rust-lang.org/stable/std/io/struct.PipeReader.html)
- [`io::PipeWriter`]
  (https://doc.rust-lang.org/stable/std/io/struct.PipeWriter.html)
- [`impl From<PipeReader> for OwnedHandle`]
  (https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeReader%3E-for-OwnedHandle)
- [`impl From<PipeWriter> for OwnedHandle`]
  (https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeWriter%3E-for-OwnedHandle)
- [`impl From<PipeReader> for Stdio`]
  (https://doc.rust-lang.org/stable/std/process/struct.Stdio.html)
- [`impl From<PipeWriter> for Stdio`]
  (https://doc.rust-lang.org/stable/std/process/struct.Stdio.html#impl-From%3CPipeWriter%3E-for-Stdio)
- [`impl From<PipeReader> for OwnedFd`]
  (https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeReader%3E-for-OwnedFd)
- [`impl From<PipeWriter> for OwnedFd`]
  (https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeWriter%3E-for-OwnedFd)
- [`Box<MaybeUninit<T>>::write`]
  (https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.write)
- [`impl TryFrom<Vec<u8>> for String`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-TryFrom%3CVec%3Cu8%3E%3E-for-String)
- [`<*const T>::offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned)
- [`<*const T>::byte_offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned)
- [`<*mut T>::offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned-1)
- [`<*mut T>::byte_offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned-1)
- [`NonNull::offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.offset_from_unsigned)
- [`NonNull::byte_offset_from_unsigned`]
  (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.byte_offset_from_unsigned)
- [`<uN>::cast_signed`]
  (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.cast_signed)
- [`NonZero::<uN>::cast_signed`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_signed-5).
- [`<iN>::cast_unsigned`]
  (https://doc.rust-lang.org/stable/std/primitive.isize.html#method.cast_unsigned).
- [`NonZero::<iN>::cast_unsigned`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_unsigned-5).
- [`<uN>::is_multiple_of`]
  (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.is_multiple_of)
- [`<uN>::unbounded_shl`]
  (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shl)
- [`<uN>::unbounded_shr`]
  (https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shr)
- [`<iN>::unbounded_shl`]
  (https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shl)
- [`<iN>::unbounded_shr`]
  (https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shr)
- [`<iN>::midpoint`]
  (https://doc.rust-lang.org/stable/std/primitive.isize.html#method.midpoint)
- [`<str>::from_utf8`]
  (https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8)
- [`<str>::from_utf8_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_mut)
- [`<str>::from_utf8_unchecked`]
  (https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_unchecked)
- [`<str>::from_utf8_unchecked_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8_unchecked_mut)

These previously stable APIs are now stable in const contexts:

- [`core::str::from_utf8_mut`]
  (https://doc.rust-lang.org/stable/std/str/fn.from_utf8_mut.html)
- [`<[T]>::copy_from_slice`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.copy_from_slice)
- [`SocketAddr::set_ip`]
  (https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_ip)
- [`SocketAddr::set_port`]
  (https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_port),
- [`SocketAddrV4::set_ip`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_ip)
- [`SocketAddrV4::set_port`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_port),
- [`SocketAddrV6::set_ip`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_ip)
- [`SocketAddrV6::set_port`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_port)
- [`SocketAddrV6::set_flowinfo`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_flowinfo)
- [`SocketAddrV6::set_scope_id`]
  (https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_scope_id)
- [`char::is_digit`]
  (https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit)
- [`char::is_whitespace`]
  (https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_whitespace)
- [`<[[T; N]]>::as_flattened`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened)
- [`<[[T; N]]>::as_flattened_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened_mut)
- [`String::into_bytes`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_bytes)
- [`String::as_str`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_str)
- [`String::capacity`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.capacity)
- [`String::as_bytes`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_bytes)
- [`String::len`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.len)
- [`String::is_empty`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.is_empty)
- [`String::as_mut_str`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_str)
- [`String::as_mut_vec`]
  (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_vec)
- [`Vec::as_ptr`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_ptr)
- [`Vec::as_slice`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_slice)
- [`Vec::capacity`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.capacity)
- [`Vec::len`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.len)
- [`Vec::is_empty`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.is_empty)
- [`Vec::as_mut_slice`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_slice)
- [`Vec::as_mut_ptr`]
  (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_ptr)

Cargo
-----
- [Add terminal integration via ANSI OSC 9;4 sequences]
  (rust-lang/cargo#14615)
- [chore: bump openssl to v3]
  (rust-lang/cargo#15232)
- [feat(package): add --exclude-lockfile flag]
  (rust-lang/cargo#15234)

Compatibility Notes
-------------------
- [Rust now raises an error for macro invocations inside the
  `#![crate_name]` attribute]
  (rust-lang/rust#127581)
- [Unstable fields are now always considered to be inhabited]
  (rust-lang/rust#133889)
- [Macro arguments of unary operators followed by open beginning
  ranges may now be matched differently]
  (rust-lang/rust#134900)
- [Make `Debug` impl of raw pointers print metadata if present]
  (rust-lang/rust#135080)
- [Warn against function pointers using unsupported ABI strings in dependencies]
  (rust-lang/rust#135767)
- [Associated types on `dyn` types are no longer deduplicated]
  (rust-lang/rust#136458)
- [Forbid attributes on `..` inside of struct patterns (`let Struct
  { #[attribute] .. }) =`]
  (rust-lang/rust#136490)
- [Make `ptr_cast_add_auto_to_object` lint into hard error]
  (rust-lang/rust#136764)
- Many `std::arch` intrinsics are now safe to call in some contexts,
  there may now be new `unused_unsafe` warnings in existing codebases.
- [Limit `width` and `precision` formatting options to 16 bits on all targets]
  (rust-lang/rust#136932)
- [Turn order dependent trait objects future incompat warning into a hard error]
  (rust-lang/rust#136968)
- [Denote `ControlFlow` as `#[must_use]`]
  (rust-lang/rust#137449)
- [Windows: The standard library no longer links `advapi32`, except
  on win7.] (rust-lang/rust#138233)
  Code such as C libraries that were relying on this assumption
  may need to explicitly link advapi32.
- [Proc macros can no longer observe expanded `cfg
  (true)` attributes.](rust-lang/rust#138844)
- [Start changing the internal representation of pasted tokens]
  (rust-lang/rust#124141). Certain invalid
  declarative macros that were previously accepted in obscure
  circumstances are now correctly rejected by the compiler. Use of
  a `tt` fragment specifier can often fix these macros.
- [Don't allow flattened format_args in const.]
  (rust-lang/rust#139624)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they
represent significant improvements to the performance or internals
of rustc and related tools.

- [Update to LLVM 20]
  (rust-lang/rust#135763)

The first rule of the `features` macro looks like this:
```
macro_rules! features {
    (
      @target: $target:ident;
      @cfg: $cfg:meta;
      @MACRO_NAME: $macro_name:ident;
      @MACRO_ATTRS: $(#[$macro_attrs:meta])*
      $(@BIND_FEATURE_NAME: $bind_feature:tt; $feature_impl:tt; $(#[$deprecate_attr:meta];)?)*
      $(@NO_RUNTIME_DETECTION: $nort_feature:tt; )*
      $(@feature: #[$stability_attr:meta] $feature:ident: $feature_lit:tt;
          $(without cfg check: $feature_cfg_check:literal;)?
          $(implied by target_features: [$($target_feature_lit:tt),*];)?
          $(#[$feature_comment:meta])*)*
    ) => {
```
Notice all the `tt` specifiers. They are used because they are forwarded
to another macro. Only `ident`, `lifetime`, and `tt` specifiers can be
forwarded this way.

But there is an exception: `$feature_lit:tt`, which was added recently.
In theory it should cause an error like this:
```
error: no rules expected `literal` metavariable
   --> /home/njn/dev/rust3/library/stdarch/crates/std_detect/src/detect/macros.rs:54:91
    |
51  | /         macro_rules! $macro_name {
52  | |             $(
53  | |                 ($feature_lit) => {
54  | |                     $crate::detect_feature!($feature, $feature_lit $(, without cfg check: $feature_cfg_check)? ...
    | |                                                                                           ^^^^^^^^^^^^^^^^^^ no rules expected this token in macro call
...   |
88  | |             };
89  | |         }
    | |_________- in this expansion of `is_x86_feature_detected!`
    |
   ::: std/tests/run-time-detect.rs:145:27
    |
145 |       println!("tsc: {:?}", is_x86_feature_detected!("tsc"));
    |                             ------------------------------- in this macro invocation
    |
note: while trying to match keyword `true`
   --> /home/njn/dev/rust3/library/stdarch/crates/std_detect/src/detect/macros.rs:12:55
    |
12  |     ($feature:tt, $feature_lit:tt, without cfg check: true) => {
    |                                                       ^^^^
    = note: captured metavariables except for `:tt`, `:ident` and `:lifetime` cannot be compared to other tokens
    = note: see <https://doc.rust-lang.org/nightly/reference/macros-by-example.html#forwarding-a-matched-fragment> for more information
```
(The URL at the end of the error has more details about this forwarding
limitation.)

In practice it doesn't cause this error. I'm not sure why, but the
existing macro implementation in rustc is far from perfect, so it's
believable that it does the wrong thing here.

Why does this matter? Because #124141
is modifying the macro implementation, and when that PR is applied the
error *does* occur. (It's one of several cases I have found where the
existing compiler accepts code it shouldn't, but #124141 causes that
code to be rejected.)

Fortunately the fix is simple: replace the `literal` specifier with `tt`.

Pkgsrc changes:
 * Adjust patches to adapt to upstream changes and new versions.
 * associated checksums

Upstream changes relative to 1.87.0:

Version 1.88.0 (2025-06-26)
==========================

Language
--------
- [Stabilize `#![feature(let_chains)]` in the 2024 edition.]
  (rust-lang/rust#132833)
  This feature allows `&&`-chaining `let` statements inside `if`
  and `while`, allowing intermixture with boolean expressions. The
  patterns inside the `let` sub-expressions can be irrefutable or
  refutable.
- [Stabilize `#![feature(naked_functions)]`.]
  (rust-lang/rust#134213)
  Naked functions allow writing functions with no compiler-generated
  epilogue and prologue, allowing full control over the generated
  assembly for a particular function.
- [Stabilize `#![feature(cfg_boolean_literals)]`.]
  (rust-lang/rust#138632)
  This allows using boolean literals as `cfg` predicates, e.g.
  `#[cfg(true)]` and `#[cfg(false)]`.
- [Fully de-stabilize the `#[bench]` attribute]
  (rust-lang/rust#134273). Usage of `#[bench]`
  without `#![feature(custom_test_frameworks)]` already triggered
  a deny-by-default future-incompatibility lint since Rust 1.77,
  but will now become a hard error.
- [Add warn-by-default `dangerous_implicit_autorefs` lint against
  implicit autoref of raw pointer dereference.]
  (rust-lang/rust#123239) The
  lint [will be bumped to deny-by-default]
  (rust-lang/rust#141661) in the next
  version of Rust.
- [Add `invalid_null_arguments` lint to prevent invalid usage of
  null pointers.] (rust-lang/rust#119220)
  This lint is uplifted from `clippy::invalid_null_ptr_usage`.
- [Change trait impl candidate preference for builtin impls and
  trivial where-clauses.] (rust-lang/rust#138176)
- [Check types of generic const parameter defaults]
  (rust-lang/rust#139646)

Compiler
--------
- [Stabilize `-Cdwarf-version` for selecting the version of DWARF
  debug information to generate.]
  (rust-lang/rust#136926)

Platform Support
----------------
- [Demote `i686-pc-windows-gnu` to Tier 2.]
  (https://blog.rust-lang.org/2025/05/26/demoting-i686-pc-windows-gnu/)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html

Libraries
---------
- [Remove backticks from `#[should_panic]` test failure message.]
  (rust-lang/rust#136160)
- [Guarantee that `[T; N]::from_fn` is generated in order of
  increasing indices.] (rust-lang/rust#139099),
  for those passing it a stateful closure.
- [The libtest flag `--nocapture` is deprecated in favor of the
  more consistent `--no-capture` flag.]
  (rust-lang/rust#139224)
- [Guarantee that `{float}::NAN` is a quiet NaN.]
  (rust-lang/rust#139483)

Stabilized APIs
---------------

- [`Cell::update`]
  (https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#method.update)
- [`impl Default for *const T`]
  (https://doc.rust-lang.org/nightly/std/primitive.pointer.html#impl-Default-for-*const+T)
- [`impl Default for *mut T`]
  (https://doc.rust-lang.org/nightly/std/primitive.pointer.html#impl-Default-for-*mut+T)
- [`HashMap::extract_if`]
  (https://doc.rust-lang.org/stable/std/collections/struct.HashMap.html#method.extract_if)
- [`HashSet::extract_if`]
  (https://doc.rust-lang.org/stable/std/collections/struct.HashSet.html#method.extract_if)
- [`proc_macro::Span::line`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.line)
- [`proc_macro::Span::column`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.column)
- [`proc_macro::Span::start`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.start)
- [`proc_macro::Span::end`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.end)
- [`proc_macro::Span::file`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.file)
- [`proc_macro::Span::local_file`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.local_file)

These previously stable APIs are now stable in const contexts:

- [`NonNull<T>::replace`]
  (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.replace)
- [`<*mut T>::replace`]
  (https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.replace)
- [`std::ptr::swap_nonoverlapping`]
  (rust-lang/rust#137280)
- [`Cell::{replace, get, get_mut, from_mut, as_slice_of_cells}`]
  (rust-lang/rust#137928)

Cargo
-----
- [Stabilize automatic garbage collection.]
  (rust-lang/cargo#14287)
- [use `zlib-rs` for gzip compression in rust code]
  (rust-lang/cargo#15417)

Rustdoc
-----
- [Doctests can be ignored based on target names using `ignore-*` attributes.]
  (rust-lang/rust#137096)
- [Stabilize the `--test-runtool` and `--test-runtool-arg` CLI
  options to specify a program (like qemu) and its arguments to run
  a doctest.] (rust-lang/rust#137096)

Compatibility Notes
-------------------
- [Finish changing the internal representation of pasted tokens]
  (rust-lang/rust#124141). Certain invalid
  declarative macros that were previously accepted in obscure
  circumstances are now correctly rejected by the compiler. Use of
  a `tt` fragment specifier can often fix these macros.
- [Fully de-stabilize the `#[bench]` attribute]
  (rust-lang/rust#134273). Usage of `#[bench]`
  without `#![feature(custom_test_frameworks)]` already triggered
  a deny-by-default future-incompatibility lint since Rust 1.77,
  but will now become a hard error.
- [Fix borrow checking some always-true patterns.]
  (rust-lang/rust#139042) The borrow checker
  was overly permissive in some cases, allowing programs that
  shouldn't have compiled.
- [Update the minimum external LLVM to 19.]
  (rust-lang/rust#139275)
- [Make it a hard error to use a vector type with a non-Rust ABI
  without enabling the required target feature.]
  (rust-lang/rust#139309)

The first rule of the `features` macro looks like this:
```
macro_rules! features {
    (
      @target: $target:ident;
      @cfg: $cfg:meta;
      @MACRO_NAME: $macro_name:ident;
      @MACRO_ATTRS: $(#[$macro_attrs:meta])*
      $(@BIND_FEATURE_NAME: $bind_feature:tt; $feature_impl:tt; $(#[$deprecate_attr:meta];)?)*
      $(@NO_RUNTIME_DETECTION: $nort_feature:tt; )*
      $(@feature: #[$stability_attr:meta] $feature:ident: $feature_lit:tt;
          $(without cfg check: $feature_cfg_check:literal;)?
          $(implied by target_features: [$($target_feature_lit:tt),*];)?
          $(#[$feature_comment:meta])*)*
    ) => {
```
Notice all the `tt` specifiers. They are used because they are forwarded
to another macro. Only `ident`, `lifetime`, and `tt` specifiers can be
forwarded this way.

But there is an exception: `$feature_lit:tt`, which was added recently.
In theory it should cause an error like this:
```
error: no rules expected `literal` metavariable
   --> /home/njn/dev/rust3/library/stdarch/crates/std_detect/src/detect/macros.rs:54:91
    |
51  | /         macro_rules! $macro_name {
52  | |             $(
53  | |                 ($feature_lit) => {
54  | |                     $crate::detect_feature!($feature, $feature_lit $(, without cfg check: $feature_cfg_check)? ...
    | |                                                                                           ^^^^^^^^^^^^^^^^^^ no rules expected this token in macro call
...   |
88  | |             };
89  | |         }
    | |_________- in this expansion of `is_x86_feature_detected!`
    |
   ::: std/tests/run-time-detect.rs:145:27
    |
145 |       println!("tsc: {:?}", is_x86_feature_detected!("tsc"));
    |                             ------------------------------- in this macro invocation
    |
note: while trying to match keyword `true`
   --> /home/njn/dev/rust3/library/stdarch/crates/std_detect/src/detect/macros.rs:12:55
    |
12  |     ($feature:tt, $feature_lit:tt, without cfg check: true) => {
    |                                                       ^^^^
    = note: captured metavariables except for `:tt`, `:ident` and `:lifetime` cannot be compared to other tokens
    = note: see <https://doc.rust-lang.org/nightly/reference/macros-by-example.html#forwarding-a-matched-fragment> for more information
```
(The URL at the end of the error has more details about this forwarding
limitation.)

In practice it doesn't cause this error. I'm not sure why, but the
existing macro implementation in rustc is far from perfect, so it's
believable that it does the wrong thing here.

Why does this matter? Because rust-lang#124141
is modifying the macro implementation, and when that PR is applied the
error *does* occur. (It's one of several cases I have found where the
existing compiler accepts code it shouldn't, but rust-lang#124141 causes that
code to be rejected.)

Fortunately the fix is simple: replace the `literal` specifier with `tt`.

…rpolated, r=petrochenkov

Remove `Nonterminal` and `TokenKind::Interpolated`

A third attempt at this; the first attempt was #96724 and the second was #114647.

r? `@ghost`