fix(tooltip): remove unnecessary tooltip whitespace (#6531)

Author: trevorade

src/lib/tooltip/tooltip.html

@@ -2,6 +2,4 @@
      [ngClass]="tooltipClass"
      [style.transform-origin]="_transformOrigin"
      [@state]="_visibility"
-     (@state.done)="_afterVisibilityAnimation($event)">
-  {{message}}
-</div>
+     (@state.done)="_afterVisibilityAnimation($event)">{{message}}</div>