In previous versions of Inform, you could write something like “[bold type][italic type]”, and the following text would be both bolded and italicized. In 6L38, it only appears to consider the latest font signifier, so the text is italic but not bold. Is this an intentional change?
It changed because in 6L** the default is now Glulx rather than Z-Machine. Using Glulx Text Effects you can change how it works, but it’s not quite as flexible as it was for the Z-Machine.