Stabilize feature vec_retain_mut on Vec and VecDeque

Author: faern

library/alloc/src/collections/vec_deque/mod.rs

@@ -2185,8 +2185,6 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(vec_retain_mut)]
-    ///
     /// use std::collections::VecDeque;
     ///
     /// let mut buf = VecDeque::new();
@@ -2199,7 +2197,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// });
     /// assert_eq!(buf, [3, 5]);
     /// ```
-    #[unstable(feature = "vec_retain_mut", issue = "90829")]
+    #[stable(feature = "vec_retain_mut", since = "1.61.0")]
     pub fn retain_mut<F>(&mut self, mut f: F)
     where
         F: FnMut(&mut T) -> bool,

library/alloc/src/vec/mod.rs

@@ -1467,8 +1467,6 @@ impl<T, A: Allocator> Vec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(vec_retain_mut)]
-    ///
     /// let mut vec = vec![1, 2, 3, 4];
     /// vec.retain_mut(|x| if *x > 3 {
     ///     false
@@ -1478,7 +1476,7 @@ impl<T, A: Allocator> Vec<T, A> {
     /// });
     /// assert_eq!(vec, [2, 3, 4]);
     /// ```
-    #[unstable(feature = "vec_retain_mut", issue = "90829")]
+    #[stable(feature = "vec_retain_mut", since = "1.61.0")]
     pub fn retain_mut<F>(&mut self, mut f: F)
     where
         F: FnMut(&mut T) -> bool,