diff --git a/src/libstd/tuple.rs b/src/libstd/tuple.rs
index 0c8273abde4..e76dcef226d 100644
--- a/src/libstd/tuple.rs
+++ b/src/libstd/tuple.rs
@@ -28,13 +28,13 @@
 //! * `Default`
 //!
 //! # Examples
-//! 
+//!
 //! Accessing elements of a tuple at specified indices:
-//! 
+//!
 //! ```
 //! let x = ("colorless",  "green", "ideas", "sleep", "furiously");
 //! assert_eq!(x.3, "sleep");
-//! 
+//!
 //! let v = (3i, 3i);
 //! let u = (1i, -5i);
 //! assert_eq!(v.0 * u.0 + v.1 * u.1, -12i);