remove whitespace.

src/Avalonia.Visuals/Rendering/RenderLoop.cs

@@ -90,7 +90,7 @@ namespace Avalonia.Rendering
                 }
             }
         }
-        
+
         private void TimerTick(TimeSpan time)
         {
             if (Interlocked.CompareExchange(ref _inTick, 1, 0) == 0)