Fixed misspelling in comment.
diff --git a/Lib/heapq.py b/Lib/heapq.py
index 698e6fe..15b728a 100644
--- a/Lib/heapq.py
+++ b/Lib/heapq.py
@@ -218,7 +218,7 @@
 #
 # The total compares needed by list.sort() on the same lists were 8627,
 # 8627, and 8632 (this should be compared to the sum of heapify() and
-# heappop() compares):  list.sort() is (unsurprisingly!) more efficent
+# heappop() compares):  list.sort() is (unsurprisingly!) more efficient
 # for sorting.
 
 def _siftup(heap, pos):