Quidditch, the sport of boarding school wizards riding broomsticks in “Harry Potter,” will become “Quadball” to the humans who play the game in real life, its leading organizations
The groups cited financial obstacles imposed by Warner Bros., the producer of the movie series, holding the trademark to Quidditch, as well as a wish to “distance themselves” from J.K. Rowling, the author of the books, and what they…