I don't believe it I know it look at the Book of Mormon when it was first published by Joseph and look at it today. All of it involving the actual scriptural text is exactly the same and not one iota of difference. The only difference from the original to the current is that the current is split into chapters with footnotes and chapter summaries a set up much like the bible. We have more than just the book of mormon as usgrant pointed out with the pearl of great price and D&C that are put in the same collection as the BOM but they are not additions to the BOM itself.