stability: fix #[stable] inheritance fallout, tweak summary

src/liballoc/rc.rs

@@ -179,9 +179,9 @@ pub struct Rc<T> {
     _noshare: marker::NoSync
 }
 
-#[stable]
 impl<T> Rc<T> {
     /// Constructs a new reference-counted pointer.
+    #[stable]
     pub fn new(value: T) -> Rc<T> {
         unsafe {
             Rc {
@@ -200,9 +200,7 @@ impl<T> Rc<T> {
             }
         }
     }
-}
 
-impl<T> Rc<T> {
     /// Downgrades the reference-counted pointer to a weak reference.
     #[experimental = "Weak pointers may not belong in this module"]
     pub fn downgrade(&self) -> Weak<T> {

src/libcollections/vec.rs

@@ -645,7 +645,6 @@ impl<T> Vec<T> {
     /// assert!(vec.capacity() >= 3);
     /// ```
     #[stable]
-    #[unstable = "matches collection reform specification, waiting for dust to settle"]
     pub fn shrink_to_fit(&mut self) {
         if mem::size_of::<T>() == 0 { return }
 

src/libcore/any.rs

@@ -88,6 +88,7 @@ use intrinsics::TypeId;
 #[stable]
 pub trait Any: 'static {
     /// Get the `TypeId` of `self`
+    #[stable]
     fn get_type_id(&self) -> TypeId;
 }
 
@@ -117,7 +118,6 @@ pub trait AnyRefExt<'a> {
 #[stable]
 impl<'a> AnyRefExt<'a> for &'a Any {
     #[inline]
-    #[stable]
     fn is<T: 'static>(self) -> bool {
         // Get TypeId of the type this function is instantiated with
         let t = TypeId::of::<T>();
@@ -130,7 +130,6 @@ impl<'a> AnyRefExt<'a> for &'a Any {
     }
 
     #[inline]
-    #[unstable = "naming conventions around acquiring references may change"]
     fn downcast_ref<T: 'static>(self) -> Option<&'a T> {
         if self.is::<T>() {
             unsafe {
@@ -159,7 +158,6 @@ pub trait AnyMutRefExt<'a> {
 #[stable]
 impl<'a> AnyMutRefExt<'a> for &'a mut Any {
     #[inline]
-    #[unstable = "naming conventions around acquiring references may change"]
     fn downcast_mut<T: 'static>(self) -> Option<&'a mut T> {
         if self.is::<T>() {
             unsafe {