Fix rustfmt check (#927)

* Add set -e to .travis.yml
* Fix fmt
* Fix codec feature

tokio-buf/src/lib.rs

@@ -17,11 +17,11 @@ extern crate either;
 extern crate futures;
 
 mod never;
-#[cfg(feature = "util")]
-pub mod util;
 mod size_hint;
 mod str;
 mod u8;
+#[cfg(feature = "util")]
+pub mod util;
 
 pub use self::size_hint::SizeHint;
 #[doc(inline)]

tokio-buf/src/u8.rs

@@ -1,8 +1,8 @@
-use BufStream;
-use never::Never;
 use bytes::{Bytes, BytesMut};
 use futures::Poll;
+use never::Never;
 use std::io;
+use BufStream;
 
 impl BufStream for Vec<u8> {
     type Item = io::Cursor<Vec<u8>>;