reexport Unpin into pin module

Author: nivkner

src/liballoc/pin.rs

@@ -96,11 +96,12 @@
 #![unstable(feature = "pin", issue = "49150")]
 
 pub use core::pin::*;
+pub use core::marker::Unpin;
 
 use core::convert::From;
 use core::fmt;
 use core::future::{Future, FutureObj, LocalFutureObj, UnsafeFutureObj};
-use core::marker::{Unpin, Unsize};
+use core::marker::Unsize;
 use core::ops::{CoerceUnsized, Deref, DerefMut};
 use core::task::{Context, Poll};
 

src/libcore/marker.rs

@@ -630,7 +630,7 @@ unsafe impl<'a, T: ?Sized> Freeze for &'a mut T {}
 ///
 /// This trait is automatically implemented for almost every type.
 ///
-/// [`replace`]: ../mem/fn.replace.html
+/// [`replace`]: ../../core/mem/fn.replace.html
 /// [`PinMut`]: ../pin/struct.PinMut.html
 #[unstable(feature = "pin", issue = "49150")]
 pub auto trait Unpin {}