Anyone who has read books for classes in high school and above knows that even classics are routinely fucked with by publishers. Even early in the work's history. I remember even in middle school someone would invariably end up with a different publisher's edition of a book for summer reading or whatnot and we'd find changes.

Unless the book is specifically declared to be the original text - and it may have to specify which original text - they're going to be edited.

However, in electronic form it should be possible to include both in one file, or two files with the original in a repo branch once all the document structure stuff has been added. That text will never change, so merging formatting-only changes should be pretty painless.