docs: fix typo

Change-Id: I39849068bb1b35a766df93ab3440829730efabaa
diff --git a/docs/html/guide/topics/data/backup.jd b/docs/html/guide/topics/data/backup.jd
index 4279d7d..aeefca8 100644
--- a/docs/html/guide/topics/data/backup.jd
+++ b/docs/html/guide/topics/data/backup.jd
@@ -576,8 +576,8 @@
 
 <h3 id="SharedPreferences">Backing up SharedPreferences</h3>
 
-<p>When you instantiate a {@link android.app.backup.SharedPreferencesBackupHelper}, you must the
-name of one or more {@link android.content.SharedPreferences} files.</p>
+<p>When you instantiate a {@link android.app.backup.SharedPreferencesBackupHelper}, you must
+include the name of one or more {@link android.content.SharedPreferences} files.</p>
 
 <p>For example, to back up a {@link android.content.SharedPreferences} file named
 "user_preferences", a complete backup agent using {@link android.app.backup.BackupAgentHelper} looks