Unpin: Fix references to Pin type

src/libcore/marker.rs

@@ -595,15 +595,15 @@ unsafe impl<T: ?Sized> Freeze for *mut T {}
 unsafe impl<'a, T: ?Sized> Freeze for &'a T {}
 unsafe impl<'a, T: ?Sized> Freeze for &'a mut T {}
 
-/// Types which can be moved out of a `Pin`.
+/// Types which can be moved out of a `PinMut`.
 ///
-/// The `Unpin` trait is used to control the behavior of the [`Pin`] type. If a
+/// The `Unpin` trait is used to control the behavior of the [`PinMut`] type. If a
 /// type implements `Unpin`, it is safe to move a value of that type out of the
-/// `Pin` pointer.
+/// `PinMut` pointer.
 ///
 /// This trait is automatically implemented for almost every type.
 ///
-/// [`Pin`]: ../mem/struct.Pin.html
+/// [`PinMut`]: ../mem/struct.PinMut.html
 #[unstable(feature = "pin", issue = "49150")]
 pub unsafe auto trait Unpin {}