Let's say I want to copy/use a book published 200 years ago. It's definitely in the public domain. Someone publishes a new version of the book (the original copyright holder, if that matters). The new edition is exactly the same but with some grammatical corrections. Can I use a copy of this new edition - or do the grammatical changes and updates make it a new copyrighted work?
I know if I could obtain a copy of the old version it would be in the public domain.