Fix use of unstable feature in test

Author: varkor

src/liballoc/lib.rs

@@ -113,6 +113,7 @@
 #![feature(slice_get_slice)]
 #![feature(slice_patterns)]
 #![feature(slice_rsplit)]
+#![feature(slice_sort_by_cached_key)]
 #![feature(specialization)]
 #![feature(staged_api)]
 #![feature(str_internals)]

src/liballoc/slice.rs

@@ -1368,7 +1368,7 @@ impl<T> [T] {
     /// v.sort_by_cached_key(|k| k.abs());
     /// assert!(v == [1, 2, -3, 4, -5]);
     /// ```
-    #[unstable(feature = "slice_sort_by_uncached_key", issue = "34447")]
+    #[unstable(feature = "slice_sort_by_cached_key", issue = "34447")]
     #[inline]
     pub fn sort_by_cached_key<K, F>(&mut self, f: F)
         where F: FnMut(&T) -> K, K: Ord
@@ -1487,7 +1487,7 @@ impl<T> [T] {
     /// deterministic behavior.
     ///
     /// Due to its key calling strategy, [`sort_unstable_by_key`](#method.sort_unstable_by_key)
-    /// is likely to be slower than [`sort_by_cached_key`](#method.sort_by_uncached_key) in
+    /// is likely to be slower than [`sort_by_cached_key`](#method.sort_by_cached_key) in
     /// cases where the key function is expensive.
     ///
     /// # Examples

src/liballoc/tests/lib.rs

@@ -23,6 +23,7 @@
 #![feature(pattern)]
 #![feature(placement_in_syntax)]
 #![feature(rand)]
+#![feature(slice_sort_by_cached_key)]
 #![feature(splice)]
 #![feature(str_escape)]
 #![feature(string_retain)]