Auto merge of #126736 - matthiaskrgr:rollup-rb20oe3, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #126380 (Add std Xtensa targets support)
 - #126636 (Resolve Clippy `f16` and `f128` `unimplemented!`/`FIXME`s )
 - #126659 (More status-quo tests for the `#[coverage(..)]` attribute)
 - #126711 (Make Option::as_[mut_]slice const)
 - #126717 (Clean up some comments near `use` declarations)
 - #126719 (Fix assertion failure for some `Expect` diagnostics.)
 - #126730 (Add opaque type corner case test)

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

compiler/rustc_middle/src/middle/privacy.rs

@@ -1,6 +1,7 @@
 //! A pass that checks to make sure private fields and methods aren't used
 //! outside their scopes. This pass will also generate a set of exported items
 //! which are available for use externally when compiled as a library.
+
 use crate::ty::{TyCtxt, Visibility};
 use rustc_data_structures::fx::{FxIndexMap, IndexEntry};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};

compiler/rustc_middle/src/mir/statement.rs

@@ -1,4 +1,5 @@
-/// Functionality for statements, operands, places, and things that appear in them.
+//! Functionality for statements, operands, places, and things that appear in them.
+
 use super::{interpret::GlobalAlloc, *};
 
 ///////////////////////////////////////////////////////////////////////////

compiler/rustc_middle/src/mir/terminator.rs

@@ -1,4 +1,5 @@
-/// Functionality for terminators and helper types that appear in terminators.
+//! Functionality for terminators and helper types that appear in terminators.
+
 use rustc_hir::LangItem;
 use smallvec::{smallvec, SmallVec};
 

compiler/rustc_middle/src/ty/abstract_const.rs

@@ -1,4 +1,5 @@
 //! A subset of a mir body used for const evaluability checking.
+
 use crate::ty::{
     self, Const, EarlyBinder, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperFoldable,
     TypeVisitableExt,