Auto merge of #9 - servo:doctest, r=Wafflespeanut

Update doctests.

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Cargo.toml

@@ -11,4 +11,3 @@ documentation = "https://doc.servo.org/fnv/"
 [lib]
 name = "fnv"
 path = "lib.rs"
-doctest = false

lib.rs

@@ -29,13 +29,12 @@
 //! map using this state with `HashMap::with_hash_state`. A full example:
 //!
 //! ```rust
-//! #![feature(hashmap_hasher)]
 //! use std::collections::HashMap;
-//! use std::collections::hash_state::DefaultState;
+//! use std::hash::BuildHasherDefault;
 //! use fnv::FnvHasher;
 //!
-//! let fnv = DefaultState::<FnvHasher>::default();
-//! let mut map = HashMap::with_hash_state(fnv);
+//! let fnv = BuildHasherDefault::<FnvHasher>::default();
+//! let mut map = HashMap::with_hasher(fnv);
 //! map.insert(1, "one");
 //! map.insert(2, "two");
 //! ```
@@ -47,13 +46,12 @@
 //! with the same mechanism.
 //!
 //! ```rust
-//! #![feature(hashmap_hasher)]
 //! use std::collections::HashSet;
-//! use std::collections::hash_state::DefaultState;
+//! use std::hash::BuildHasherDefault;
 //! use fnv::FnvHasher;
 //!
-//! let fnv = DefaultState::<FnvHasher>::default();
-//! let mut set = HashSet::with_hash_state(fnv);
+//! let fnv = BuildHasherDefault::<FnvHasher>::default();
+//! let mut set = HashSet::with_hasher(fnv);
 //! set.insert(1);
 //! set.insert(2);
 //! ```