THE STRANGERS: PREY AT NIGHT **** USA 2018 Dir: Johannes Roberts. 85 mins This long-gestating sequel, although boasting the same “based on true events” tag, shuns the grimness and slow-burn terror of its predecessor in favour of briskly paced 80s slasher-style cat-and-mouse thrills. After a nicely creepy stranger-in-bed pre-titles frisson…