Fix bug in stream iter doc
@@ -29,7 +29,7 @@ impl<I> Unpin for Iter<I> {}
/// use futures_executor::block_on;
///
/// # fn main() {
-/// let mut stream = stream::iter_ok::<_, ()>(vec![17, 19]);
+/// let mut stream = stream::iter(vec![17, 19]);
/// assert_eq!(Ok(vec![17, 19]), block_on(stream.collect()));
/// # }
/// ```
