Five major websites often used for wedding planning have pledged to cut back on promoting and romanticizing weddings at former slave plantations. Pinterest, The Knot Worldwide — which owns The Knot and WeddingWire — and Brides announced Wednesday that they would make a variety of changes, including removing all references to plantations on their sites and prohibiting adjectives like “charming” to describe venues where many Americans’ ancestors were once enslaved, tortured and raped. And on Thursday, Zola said it would remove plantations from its venue listings. The developments, a number of which were reported by BuzzFeed News, came in response...