This one time, at band camp, Mark Brown wrote: >That's a first step but it is also possible for there to be incompatible >semantic changes which can't be detected in this fashion. This is true, but I'm not aiming to make the perfect tool -- I have strong instincts that the complete problem intractable. -- jaq@spacepants.org http://spacepants.org/jaq.gpg A user and his leisure time are soon parted.