I have a number of friends who are authors published with major houses, indie houses and everywhere in between.
I can assure you that they are edited by humans
. Doesn't mean stuff doesn't get missed or that there's the occasional bad egg in there or whatever [one friend had several words run together more than once]. It does happen. But they aren't edited by computers. At least not new stuff. Transferring old stuff to new formats [like ebooks] could well be different. Even new books in ebooks don't always translate well [read a Kindle book a couple weeks ago with weird chapter and line breaks occasionally - from a major publisher].
But yes, does make you want to hug your BRs and/or critique partners, doesn't it
?
Carol