Auto merge of rust-lang#82249 - JohnTitor:rollup-3jbqija, r=JohnTitor

Rollup of 8 pull requests

Successful merges:

 - rust-lang#82055 (Add diagnostics for specific cases for const/type mismatch err)
 - rust-lang#82155 (Use !Sync std::lazy::OnceCell in usefulness checking)
 - rust-lang#82202 (add specs for riscv32/riscv64 musl targets)
 - rust-lang#82203 (Move some tests to more reasonable directories - 4)
 - rust-lang#82211 (make `suggest_setup` help messages better)
 - rust-lang#82212 (Remove redundant rustc_data_structures path component)
 - rust-lang#82240 (remove useless ?s (clippy::needless_question_marks))
 - rust-lang#82243 (Add more intra-doc links to std::io)

Failed merges:

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

Author: bors

std/src/io/stdio.rs

@@ -231,7 +231,7 @@ pub struct Stdin {
     inner: &'static Mutex<BufReader<StdinRaw>>,
 }
 
-/// A locked reference to the `Stdin` handle.
+/// A locked reference to the [`Stdin`] handle.
 ///
 /// This handle implements both the [`Read`] and [`BufRead`] traits, and
 /// is constructed via the [`Stdin::lock`] method.
@@ -494,7 +494,7 @@ pub struct Stdout {
     inner: Pin<&'static ReentrantMutex<RefCell<LineWriter<StdoutRaw>>>>,
 }
 
-/// A locked reference to the `Stdout` handle.
+/// A locked reference to the [`Stdout`] handle.
 ///
 /// This handle implements the [`Write`] trait, and is constructed via
 /// the [`Stdout::lock`] method.
@@ -708,9 +708,9 @@ pub struct Stderr {
     inner: Pin<&'static ReentrantMutex<RefCell<StderrRaw>>>,
 }
 
-/// A locked reference to the `Stderr` handle.
+/// A locked reference to the [`Stderr`] handle.
 ///
-/// This handle implements the `Write` trait and is constructed via
+/// This handle implements the [`Write`] trait and is constructed via
 /// the [`Stderr::lock`] method.
 ///
 /// ### Note: Windows Portability Consideration