fix warnings

src/response.rs

@@ -521,7 +521,7 @@ fn read_next_line<R: Read>(reader: &mut R) -> IoResult<AsciiString> {
         let byte = reader.bytes().next();
 
         let byte = match byte {
-            Some(b) => r#try!(b),
+            Some(b) => b?,
             None => return Err(IoError::new(ErrorKind::ConnectionAborted, "Unexpected EOF")),
         };
 

src/test/mod.rs

@@ -15,7 +15,7 @@ mod range;
 mod redirect;
 mod simple;
 
-type RequestHandler = Fn(&Unit) -> Result<Stream, Error> + Send + 'static;
+type RequestHandler = dyn Fn(&Unit) -> Result<Stream, Error> + Send + 'static;
 
 lazy_static! {
     pub(crate) static ref TEST_HANDLERS: Arc<Mutex<HashMap<String, Box<RequestHandler>>>> =