Rollup merge of #96628 - joshtriplett:stabilize-then-some, r=m-ou-se

Stabilize `bool::then_some`

FCP completed in rust-lang/rust#80967

Author: JohnTitor

core/src/bool.rs

@@ -9,12 +9,10 @@ impl bool {
     /// # Examples
     ///
     /// ```
-    /// #![feature(bool_to_option)]
-    ///
     /// assert_eq!(false.then_some(0), None);
     /// assert_eq!(true.then_some(0), Some(0));
     /// ```
-    #[unstable(feature = "bool_to_option", issue = "80967")]
+    #[stable(feature = "bool_to_option", since = "1.62.0")]
     #[rustc_const_unstable(feature = "const_bool_to_option", issue = "91917")]
     #[inline]
     pub const fn then_some<T>(self, t: T) -> Option<T>

core/tests/lib.rs

@@ -3,7 +3,6 @@
 #![feature(array_methods)]
 #![feature(array_windows)]
 #![feature(bench_black_box)]
-#![feature(bool_to_option)]
 #![feature(box_syntax)]
 #![feature(cell_update)]
 #![feature(const_assume)]