Orlando, Fla. — Darden Restaurants, Inc. and Ruth’s Hospitality Group, Inc. have entered into a definitive merger agreement in which Darden will acquire all of the outstanding shares of Ruth’s in an all-cash transaction with an equity value of approximately $715 million. Ruth’s, owner and operator of Ruth’s Chris Steak House, will complement Darden’s portfolio of differentiated brands which currently includes Olive Garden, LongHorn Steakhouse, Yard House, Cheddar’s Scratch Kitchen, The Capital Grille, Seasons 52, Bahama Breeze and Eddie V’s. Ruth’s Chris was founded in 1965 in New Orleans by …