Rollup merge of rust-lang#99419 - yoshuawuyts:stabilize-task-ready, r=Mark-Simulacrum

Stabilize `core::task::ready!`

This stabilizes `core::task::ready!` for Rust 1.64. The FCP for stabilization was just completed here rust-lang#70922 (comment). Thanks!

Closes rust-lang#70922

cc/ `@rust-lang/libs-api`

Author: matthiaskrgr

library/core/src/task/mod.rs

@@ -11,7 +11,7 @@ mod wake;
 pub use self::wake::{Context, RawWaker, RawWakerVTable, Waker};
 
 mod ready;
-#[unstable(feature = "ready_macro", issue = "70922")]
+#[stable(feature = "ready_macro", since = "1.64.0")]
 pub use ready::ready;
 #[unstable(feature = "poll_ready", issue = "89780")]
 pub use ready::Ready;

library/core/src/task/ready.rs

@@ -13,8 +13,6 @@ use core::task::Poll;
 /// # Examples
 ///
 /// ```
-/// #![feature(ready_macro)]
-///
 /// use std::task::{ready, Context, Poll};
 /// use std::future::{self, Future};
 /// use std::pin::Pin;
@@ -34,7 +32,6 @@ use core::task::Poll;
 /// The `ready!` call expands to:
 ///
 /// ```
-/// # #![feature(ready_macro)]
 /// # use std::task::{Context, Poll};
 /// # use std::future::{self, Future};
 /// # use std::pin::Pin;
@@ -53,7 +50,7 @@ use core::task::Poll;
 ///     # Poll::Ready(())
 /// # }
 /// ```
-#[unstable(feature = "ready_macro", issue = "70922")]
+#[stable(feature = "ready_macro", since = "1.64.0")]
 #[rustc_macro_transparency = "semitransparent"]
 pub macro ready($e:expr) {
     match $e {