this document was edited in such a detailed fashion that even individual words had been struck off and his preferred replacements inserted, as well as some passages wholly excised and some dialogue replaced with the dialogue from the screenplay. If that's not line-editing, I don't know what is.What's in that book is there because Mr. Lucas wanted it to be there. What's not in that book is not there because Mr. Lucas wanted it gone.
But hey, not as if common sense dictates anything here.