Auto merge of rust-lang#135420 - GuillaumeGomez:rollup-93vepka, r=Gui…

…llaumeGomez

Rollup of 7 pull requests

Successful merges:

 - rust-lang#135348 (rustdoc-json: Include items in stripped modules in `Crate::paths`.)
 - rust-lang#135365 (Update the explanation for why we use box_new in vec!)
 - rust-lang#135383 (De-abstract tagged ptr and make it covariant)
 - rust-lang#135401 (Remove some empty expected files to fix blessing)
 - rust-lang#135406 (Update unstable lint docs to include required feature attributes)
 - rust-lang#135407 (Deny various clippy lints)
 - rust-lang#135411 (run_make_support: add `#![warn(unreachable_pub)]`)

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

alloc/src/macros.rs

@@ -48,8 +48,8 @@ macro_rules! vec {
     );
     ($($x:expr),+ $(,)?) => (
         <[_]>::into_vec(
-            // Using the intrinsic produces a dramatic improvement in compile
-            // time when constructing arrays with many elements.
+            // Using the intrinsic produces a dramatic improvement in stack usage for
+            // unoptimized programs using this code path to construct large Vecs.
             $crate::boxed::box_new([$($x),+])
         )
     );