Doc update: clean up

<p>You can use scrollers ({@link android.widget.Scroller} or {@link

android.widget.OverScroller}) to collect the data you need to produce a

scrolling animation in response to a touch event. {@link

android.widget.Scroller} and {@link android.widget.OverScroller} are largely

interchangeable—the difference is that {@link android.widget.OverScroller}

allows temporarily scrolling beyond the minimum/maximum boundaries and springing

back to the bounds. This is normally rendered using a "glow" effect, provided by

the {@link android.widget.EdgeEffect} or {@link

android.support.v4.widget.EdgeEffectCompat} classes. </p>

scrolling animation in response to a touch event.</p>

<p>A scroller is used  to animate scrolling over time, using platform-standard

scrolling physics (friction, velocity, etc.). The scroller itself doesn't

}</pre>

<p>For another example of scroller usage, see the <a href="http://github.com/android/platform_frameworks_support/blob/master/v4/java/android/support/v4/view/ViewPager.java">source code</a> for the 

{@link android.support.v4.view.ViewPager} class. It scrolls in response to flings, 

and uses scrolling to implement the "snapping to page" animation.</p>

{@link android.support.v4.view.ViewPager} class.</p>