Auto merge of rust-lang#102388 - JohnTitor:rollup-mbyw6fl, r=JohnTitor

Rollup of 8 pull requests

Successful merges:

 - rust-lang#100747 (Add long description and test for E0311)
 - rust-lang#102232 (Stabilize bench_black_box)
 - rust-lang#102288 (Suggest unwrapping `???<T>` if a method cannot be found on it but is present on `T`.)
 - rust-lang#102338 (Deny associated type bindings within associated type bindings)
 - rust-lang#102347 (Unescaping cleanups)
 - rust-lang#102348 (Tweak `FulfillProcessor`.)
 - rust-lang#102378 (Use already resolved `self_ty` in `confirm_fn_pointer_candidate`)
 - rust-lang#102380 (rustdoc: remove redundant mobile `.source > .sidebar` CSS)

Failed merges:

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

Author: bors

tests/fail/invalid_bool.rs

@@ -1,7 +1,7 @@
 // Validation makes this fail in the wrong place
 // Make sure we find these even with many checks disabled.
 //@compile-flags: -Zmiri-disable-alignment-check -Zmiri-disable-stacked-borrows -Zmiri-disable-validation
-#![feature(bench_black_box)]
+
 
 fn main() {
     let b = unsafe { std::mem::transmute::<u8, bool>(2) };

tests/pass/float.rs

@@ -1,4 +1,4 @@
-#![feature(stmt_expr_attributes, bench_black_box)]
+#![feature(stmt_expr_attributes)]
 #![allow(arithmetic_overflow)]
 use std::fmt::Debug;
 use std::hint::black_box;

tests/pass/u128.rs

@@ -1,4 +1,3 @@
-#![feature(bench_black_box)]
 use std::hint::black_box as b;
 
 fn main() {