Updated references to extra in libcollections docs

src/libcollections/deque.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Container traits for extra
+//! Container traits for collections
 
 use std::container::Mutable;
 

src/libcollections/dlist.rs

@@ -13,7 +13,7 @@
 //! The DList allows pushing and popping elements at either end.
 //!
 //! DList implements the trait Deque. It should be imported with `use
-//! extra::container::Deque`.
+//! collections::deque::Deque`.
 
 
 // DList is constructed like a singly-linked list over the field `next`.

src/libcollections/ringbuf.rs

@@ -11,7 +11,7 @@
 //! A double-ended queue implemented as a circular buffer
 //!
 //! RingBuf implements the trait Deque. It should be imported with `use
-//! extra::container::Deque`.
+//! collections::deque::Deque`.
 
 use std::cmp;
 use std::slice;