Fix formatting

Xamarin.Forms.Platform.UAP/ListViewRenderer.cs

@@ -87,7 +87,7 @@ namespace Xamarin.Forms.Platform.UWP
 					new CollectionViewSource { Source = Element.ItemsSource, IsSourceGrouped = Element.IsGroupingEnabled };
 			}
 
-      List.UpdateLayout();
+			List.UpdateLayout();
 		}
 
 		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)