add extra lines to tooltip demo files

Author: andrewseguin

src/demo-app/tooltip/tooltip-demo.html

@@ -49,4 +49,4 @@ <h1>Tooltip Demo</h1>
   <button md-raised-button color="primary" (mouseenter)="tooltip.toggle()">
     Toggle tooltip
   </button>
-</div>
+</div>

src/demo-app/tooltip/tooltip-demo.scss

@@ -5,4 +5,4 @@
   md-radio-button {
     display: block;
   }
-}
+}

src/demo-app/tooltip/tooltip-demo.ts

@@ -13,4 +13,4 @@ export class TooltipDemo {
   message: string = 'Here is the tooltip';
   showDelay = 0;
   hideDelay = 0;
-}
+}