Make raw_vec perma-unstable and hidden

Author: SimonSapin

Diff for: src/liballoc/raw_vec.rs

@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![unstable(feature = "raw_vec_internals", reason = "implemention detail", issue = "0")]
+#![doc(hidden)]
+
 use core::cmp;
 use core::mem;
 use core::ops::Drop;
@@ -264,7 +267,7 @@ impl<T, A: Alloc> RawVec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(alloc)]
+    /// # #![feature(alloc, raw_vec_internals)]
     /// # extern crate alloc;
     /// # use std::ptr;
     /// # use alloc::raw_vec::RawVec;
@@ -468,7 +471,7 @@ impl<T, A: Alloc> RawVec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(alloc)]
+    /// # #![feature(alloc, raw_vec_internals)]
     /// # extern crate alloc;
     /// # use std::ptr;
     /// # use alloc::raw_vec::RawVec;

Diff for: src/libarena/lib.rs

@@ -26,6 +26,7 @@
 #![feature(alloc)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
+#![feature(raw_vec_internals)]
 #![cfg_attr(test, feature(test))]
 
 #![allow(deprecated)]

Diff for: src/test/rustdoc-js/struct-vec.js

@@ -14,6 +14,5 @@ const EXPECTED = {
     'others': [
         { 'path': 'std::vec', 'name': 'Vec' },
         { 'path': 'std::collections', 'name': 'VecDeque' },
-        { 'path': 'alloc::raw_vec', 'name': 'RawVec' },
     ],
 };