Auto merge of rust-lang#128461 - matthiaskrgr:rollup-3dpp11g, r=matth…

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#123813 (Add `REDUNDANT_IMPORTS` lint for new redundant import detection)
 - rust-lang#126697 ([RFC] mbe: consider the `_` in 2024 an expression)
 - rust-lang#127159 (match lowering: Hide `Candidate` from outside the lowering algorithm)
 - rust-lang#128244 (Peel off explicit (or implicit) deref before suggesting clone on move error in borrowck, remove some hacks)
 - rust-lang#128431 (Add myself as VxWorks target maintainer for reference)
 - rust-lang#128438 (Add special-case for [T, 0] in dropck_outlives)
 - rust-lang#128457 (Fix docs for OnceLock::get_mut_or_init)

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

std/src/sync/once_lock.rs

@@ -309,9 +309,7 @@ impl<T> OnceLock<T> {
     /// Gets the mutable reference of the contents of the cell, initializing
     /// it with `f` if the cell was empty.
     ///
-    /// Many threads may call `get_mut_or_init` concurrently with different
-    /// initializing functions, but it is guaranteed that only one function
-    /// will be executed.
+    /// This method never blocks.
     ///
     /// # Panics
     ///
@@ -401,6 +399,8 @@ impl<T> OnceLock<T> {
     /// it with `f` if the cell was empty. If the cell was empty and `f` failed,
     /// an error is returned.
     ///
+    /// This method never blocks.
+    ///
     /// # Panics
     ///
     /// If `f` panics, the panic is propagated to the caller, and