prettify `<input type=range>` #101

<input type='range' id='r1' class='tip fill fill-replace' 

       value='7' min='1' max='13' />

<input type='range' id='r2' class='tip fill' 

       value='60' />

<input type='range' id='r3' class='tip' 

       value='25' step='25' />

<input type='range' id='r4' class='fill' 

       value='87' />