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

Rollup of 8 pull requests

Successful merges:

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

Failed merges:

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

compiler/rustc_span/src/symbol.rs

@@ -224,6 +224,7 @@ symbols! {
         Left,
         LinkedList,
         LintPass,
+        LocalKey,
         Mutex,
         MutexGuard,
         N,
@@ -266,6 +267,7 @@ symbols! {
         Rc,
         Ready,
         Receiver,
+        RefCell,
         Relaxed,
         Release,
         Result,
@@ -274,6 +276,7 @@ symbols! {
         Rust,
         RustcDecodable,
         RustcEncodable,
+        RwLock,
         RwLockReadGuard,
         RwLockWriteGuard,
         Send,