Fixed a file layout typo

Author: bbuchanan208

app/src/main/java/com/teamtreehouse/oslist/MainActivity.java

@@ -27,7 +27,8 @@ protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        mDrawerList = (ListView)findViewById(R.id.navList);mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
+        mDrawerList = (ListView)findViewById(R.id.navList);
+        mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
         mActivityTitle = getTitle().toString();
 
         addDrawerItems();