…iaskrgr

Rollup of 10 pull requests

Successful merges:

 - rust-lang#137375 (Minor internal comments fix for `BufRead::read_line`)
 - rust-lang#137641 (More precisely document `Global::deallocate()`'s safety.)
 - rust-lang#137755 (doc: update Wasmtime flags)
 - rust-lang#137851 (improve `simd_select` error message when used with invalid mask type)
 - rust-lang#137860 (rustc_target: Add msync target feature and enable it on powerpcspe targets)
 - rust-lang#137871 (fix `RangeBounds::is_empty` documentation)
 - rust-lang#137873 (Disable `f16` on Aarch64 without `neon`)
 - rust-lang#137876 (Adjust triagebot.toml entries for `rustc_mir_build/src/builder/`)
 - rust-lang#137883 (edit mailmap)
 - rust-lang#137886 (`name()` and `trimmed_name()` for `stable_mir::crate_def::DefId`)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#137860 - taiki-e:powerpcspe-msync, r=workingjubilee

rustc_target: Add msync target feature and enable it on powerpcspe targets

Some older PowerPC processors do not have the `sync` (`sync 0`) and `lwsync` (`sync 1`) instructions, but instead have the `msync` instruction. (IIRC `msync` and `sync` will be assembled into the same bit-pattern, but `lwsync` will be SIGILL. See also https://gcc.gnu.org/legacy-ml/gcc-patches/2006-11/msg01238.html.)

LLVM recognizes this as the [`msync` feature](https://github.com/llvm/llvm-project/blob/cc5d8a4b2fc765c3c432f1ad0b185dae518d41bd/llvm/lib/Target/PowerPC/PPC.td#L140) and enables for some cpus such as [e500](https://github.com/llvm/llvm-project/blob/cc5d8a4b2fc765c3c432f1ad0b185dae518d41bd/llvm/lib/Target/PowerPC/PPC.td#L644).

powerpcspe is a target for CPUs such as e500 ([Debian Wiki](https://wiki.debian.org/PowerPCSPEPort)). However, the `msync` feature is currently not enabled except for vxworks, and at least since 2022-04, powerpc-unknown-linux-gnuspe was known to not work on real hardware without `-C target-cpu` (e.g., rust-lang#96394, rust-lang#117361).

https://github.com/rust-lang/rust/blob/8c392966a013fd8a09e6b78b3c8d6e442bc278e1/compiler/rustc_target/src/spec/targets/powerpc_wrs_vxworks_spe.rs#L28

Fixes rust-lang#117361

cc `@BKPepe` ([powerpc-unknown-linux-muslspe target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-linux-muslspe.html#target-maintainers))
cc `@glaubitz` (who added powerpc-unknown-linux-gnuspe in rust-lang#48484)
cc `@th0ma7` (who opened rust-lang#117361)

r? workingjubilee

`@rustbot` label +O-PowerPC +A-target-feature

…ubilee

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc `@glaubitz`
cc `@BKPepe`
r? workingjubilee

`@rustbot` label +O-PowerPC

…ubilee

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc ``@glaubitz``
cc ``@BKPepe``
r? workingjubilee

``@rustbot`` label +O-PowerPC

…ubilee

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc ```@glaubitz```
cc ```@BKPepe```
r? workingjubilee

```@rustbot``` label +O-PowerPC

Rollup merge of rust-lang#137868 - taiki-e:powerpcspe-doc, r=workingjubilee

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc ```@glaubitz```
cc ```@BKPepe```
r? workingjubilee

```@rustbot``` label +O-PowerPC

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang/rust#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc ```@glaubitz```
cc ```@BKPepe```
r? workingjubilee

```@rustbot``` label +O-PowerPC

Add minimal platform support documentation for powerpc-unknown-linux-gnuspe

Per rust-lang/rust#137860 (comment), add minimal platform support documentation, including a brief summary and links to more detailed information about this target.

The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.

I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.

cc ```@glaubitz```
cc ```@BKPepe```
r? workingjubilee

```@rustbot``` label +O-PowerPC