diff --git a/src/libcollections/binary_heap.rs b/src/libcollections/binary_heap.rs
index efd56bdb264..29258180c67 100644
--- a/src/libcollections/binary_heap.rs
+++ b/src/libcollections/binary_heap.rs
@@ -246,6 +246,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -263,6 +265,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::with_capacity(10);
@@ -278,6 +282,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let heap = BinaryHeap::from(vec![1, 2, 3, 4]);
@@ -296,6 +302,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -316,6 +324,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::with_capacity(100);
@@ -340,6 +350,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -361,6 +373,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -377,6 +391,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap: BinaryHeap<i32> = BinaryHeap::with_capacity(100);
@@ -395,6 +411,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::from(vec![1, 3]);
@@ -418,6 +436,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -440,6 +460,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// #![feature(binary_heap_extras)]
     ///
@@ -478,6 +500,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// #![feature(binary_heap_extras)]
     ///
@@ -508,6 +532,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let heap = BinaryHeap::from(vec![1, 2, 3, 4, 5, 6, 7]);
@@ -528,6 +554,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     ///
@@ -628,6 +656,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::from(vec![1, 3]);
@@ -643,6 +673,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::new();
@@ -666,6 +698,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::from(vec![1, 3]);
@@ -688,6 +722,8 @@ impl<T: Ord> BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let mut heap = BinaryHeap::from(vec![1, 3]);
@@ -915,6 +951,8 @@ impl<T: Ord> IntoIterator for BinaryHeap<T> {
     ///
     /// # Examples
     ///
+    /// Basic usage:
+    ///
     /// ```
     /// use std::collections::BinaryHeap;
     /// let heap = BinaryHeap::from(vec![1, 2, 3, 4]);