Pinned down event behavior of Windows.Close().

redo/window.go

@@ -20,7 +20,8 @@ type Window interface {
 	// Close creates a Request to close the Window.
 	// Any Controls within the Window are destroyed, and the Window itself is also destroyed.
 	// Attempting to use a Window after it has been closed results in undefined behavior.
-	// TODO does this raise OnClosing or bypass it?
+	// Close unconditionally closes the Window; it neither raises OnClosing nor checks for a return from OnClosing.
+	// TODO make sure the above happens on GTK+ and Mac OS X; it does on Windows
 	Close() *Request
 
 	// OnClosing creates a Request to register an event handler that is triggered when the user clicks the Window's close button.