You have mistaken the objection. There is no reason to think it would be a small fractional increase, especially since little parts of manuals--single paragraphs even--are useful reusable bits just in the way that single functions of Lisp are.
Reusing a single paragraph is fair use--you don't need to follow the license conditions. > Debian doesn't have a view on this; various Debian developers have > variou views. I have been trying to convince Debian developers that > the GFDL's methods are proper, but you're all entitled to form your > own opinions and make your own decisions. Um, Debian *does* have a view on this. My understanding is that there is no final decision. If and when the issue is decided, I will cease discussing it here.