see 06/24 log

Author: Blankj

app/src/main/res/layout/app_bar_main.xml

@@ -35,7 +35,6 @@
         </android.support.design.widget.CollapsingToolbarLayout>
     </android.support.design.widget.AppBarLayout>
 
-
     <android.support.v4.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"