Auto merge of rust-lang#137982 - matthiaskrgr:rollup-12jvilg, r=matthiaskrgr

Rollup of 12 pull requests

Successful merges:

 - rust-lang#136975 (Look for `python3` first on MacOS, not `py`)
 - rust-lang#137240 (Slightly reformat `std::fs::remove_dir_all` error docs)
 - rust-lang#137303 (Remove `MaybeForgetReturn` suggestion)
 - rust-lang#137463 ([illumos] attempt to use posix_spawn to spawn processes)
 - rust-lang#137722 (`librustdoc`: 2024 edition! 🎊)
 - rust-lang#137758 (fix usage of ty decl macro fragments in attributes)
 - rust-lang#137772 (Fix char count in `Display` for `ByteStr`)
 - rust-lang#137805 (adjust Layout debug printing to match the internal field name)
 - rust-lang#137808 (Do not require that unsafe fields lack drop glue)
 - rust-lang#137913 (Allow struct field default values to reference struct's generics)
 - rust-lang#137963 (Add ``dyn`` keyword to `E0373` examples)
 - rust-lang#137975 (Remove unused `PpMode::needs_hir`)

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

Author: bors

library/std/Cargo.toml

@@ -35,7 +35,7 @@ miniz_oxide = { version = "0.8.0", optional = true, default-features = false }
 addr2line = { version = "0.24.0", optional = true, default-features = false }
 
 [target.'cfg(not(all(windows, target_env = "msvc")))'.dependencies]
-libc = { version = "0.2.169", default-features = false, features = [
+libc = { version = "0.2.170", default-features = false, features = [
     'rustc-dep-of-std',
 ], public = true }
 

library/std/src/fs.rs

@@ -2857,9 +2857,11 @@ pub fn remove_dir<P: AsRef<Path>>(path: P) -> io::Result<()> {
 ///
 /// See [`fs::remove_file`] and [`fs::remove_dir`].
 ///
-/// `remove_dir_all` will fail if `remove_dir` or `remove_file` fail on any constituent paths, including the root `path`.
-/// As a result, the directory you are deleting must exist, meaning that this function is not idempotent.
-/// Additionally, `remove_dir_all` will also fail if the `path` is not a directory.
+/// [`remove_dir_all`] will fail if [`remove_dir`] or [`remove_file`] fail on *any* constituent
+/// paths, *including* the root `path`. Consequently,
+///
+/// - The directory you are deleting *must* exist, meaning that this function is *not idempotent*.
+/// - [`remove_dir_all`] will fail if the `path` is *not* a directory.
 ///
 /// Consider ignoring the error if validating the removal is not required for your use case.
 ///