Changed spaces to tabs

Xwt.WPF/Xwt.WPFBackend.CellViews/CanvasCellViewBackend.cs

@@ -40,10 +40,10 @@ namespace Xwt.WPFBackend
 			if (e.OldValue != null)
 				((ValuesContainer)e.OldValue).PropertyChanged -= CanvasCellRenderer_PropertyChanged;
 
-            if (e.NewValue is ValuesContainer)
-            {
-                ((ValuesContainer)DataContext).PropertyChanged += CanvasCellRenderer_PropertyChanged;
-            }
+			if (e.NewValue is ValuesContainer)
+			{
+				((ValuesContainer)DataContext).PropertyChanged += CanvasCellRenderer_PropertyChanged;
+			}
 		}
 
 		void CanvasCellRenderer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)