Fans of PBS’ “Finding Your Roots” will recognize the setup: a massive family tree spread out on a table, with Henry Louis Gates Jr. ready to explore the branches of someone’s lineage they never knew they had. But this was a *holy* different experience. This was the pope. Gates met with Pope Leo XIV in July at the Vatican after the Harvard professor and PBS host published insights into his ancestry in The New York Times Magazine. The family tree for the man born Robert Francis Prevost in Chicago