Fix a missing word in AppCompatDelegate documentation

Bug:
https://code.google.com/p/android/issues/detail?id=185636

Change-Id: I8bd82d55b114c38f0a3621da4029f5e8fa32381a
diff --git a/v7/appcompat/src/android/support/v7/app/AppCompatDelegate.java b/v7/appcompat/src/android/support/v7/app/AppCompatDelegate.java
index e00d579..6894f58 100644
--- a/v7/appcompat/src/android/support/v7/app/AppCompatDelegate.java
+++ b/v7/appcompat/src/android/support/v7/app/AppCompatDelegate.java
@@ -47,8 +47,8 @@
  * This class represents a delegate which you can use to extend AppCompat's support to any
  * {@link android.app.Activity}.
  * <p>
- * When using an {@link AppCompatDelegate}, you should any methods exposed in it rather than the
- * {@link android.app.Activity} method of the same name. This applies to:
+ * When using an {@link AppCompatDelegate}, you should extend any methods exposed in it rather than
+ * the {@link android.app.Activity} method of the same name. This applies to:
  * <ul>
  *     <li>{@link #addContentView(android.view.View, android.view.ViewGroup.LayoutParams)}</li>
  *     <li>{@link #setContentView(int)}</li>