Merge pull request #692 from tomekwi/patch-2

Fix typo

Author: mattpodwysocki

doc/gettingstarted/creating.md

@@ -1,6 +1,6 @@
 # Creating and Subscribing to Simple Observable Sequences #
 
-You do not need to implement the `Observable` class manually to create an observable sequences. Similarly, you do not need to implement `Observer` either to subscribe to a sequence. By installing the Reactive Extension libraries, you can take advantage of the `Observable` type which provides many operators for you to create a simple sequence with zero, one or more elements. In addition, RxJS provides an overloaded `subscribe` method which allows you to pass in `onNext`, `onError` and `onCompleted` function handlers.
+You do not need to implement the `Observable` class manually to create an observable sequence. Similarly, you do not need to implement `Observer` either to subscribe to a sequence. By installing the Reactive Extension libraries, you can take advantage of the `Observable` type which provides many operators for you to create a simple sequence with zero, one or more elements. In addition, RxJS provides an overloaded `subscribe` method which allows you to pass in `onNext`, `onError` and `onCompleted` function handlers.
 
 ## Creating a sequence from scratch ##