Auto merge of rust-lang#70692 - Centril:rollup-d0t4ecx, r=Centril

Rollup of 8 pull requests

Successful merges:

 - rust-lang#70281 (Implement Hash for Infallible)
 - rust-lang#70421 (parse: recover on `const fn()` / `async fn()`)
 - rust-lang#70615 (Renamed `PerDefTables` to `Tables`)
 - rust-lang#70631 (Update cargo)
 - rust-lang#70634 (Remove some reexports in `rustc_middle`)
 - rust-lang#70658 (add `STILL_FURTHER_SPECIALIZABLE` flag)
 - rust-lang#70678 (Add missing markdown rust annotation)
 - rust-lang#70681 (Handle unterminated raw strings with no #s properly)

Failed merges:

r? @ghost

Author: bors

src/doc/unstable-book/src/language-features/generators.md

@@ -87,7 +87,7 @@ Feedback on the design and usage is always appreciated!
 
 The `Generator` trait in `std::ops` currently looks like:
 
-```
+```rust
 # #![feature(arbitrary_self_types, generator_trait)]
 # use std::ops::GeneratorState;
 # use std::pin::Pin;
@@ -107,7 +107,7 @@ point for executing the `Generator` itself.
 
 The return value of `resume`, `GeneratorState`, looks like:
 
-```
+```rust
 pub enum GeneratorState<Y, R> {
     Yielded(Y),
     Complete(R),

src/libcore/convert/mod.rs

@@ -41,6 +41,7 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use crate::fmt;
+use crate::hash::{Hash, Hasher};
 
 mod num;
 
@@ -746,3 +747,10 @@ impl From<!> for Infallible {
         x
     }
 }
+
+#[stable(feature = "convert_infallible_hash", since = "1.44.0")]
+impl Hash for Infallible {
+    fn hash<H: Hasher>(&self, _: &mut H) {
+        match *self {}
+    }
+}