combine_supp: Alert users to duplicated data and show code in message that lets them find it #88
Description
combine_supp: Alert users to duplicated data and show code in message that lets them find it.
It looks like pivot_wider is being used and that warning is being surfaced, but a lot of users are not familar with it's message. I believe this message should be improved and code provided that allows users to quickly check for duplicates.
