Look, if you can assume that the legal system will start caring about specific edits along the way to the final draft, and you can assume that essentially all t

Look, if you can assume that the legal system will start caring about specific edits along the way to the final draft, and you can assume that essentially all tools will start tracking the history of these changes, and you can assume that the trivial fix (copy paste the final version into a new document) will be underlined either technically or legally, then I can assume that Congress will change the law to make these inconsequential details no longer matter. (It's highly unlikely that Congress would actually do a useful thing, but then the sum total of all your assumptions was also highly unlikely, wasn't it?)