xlisp #23 `difference-of-squares' now with entry in config.json
xlisp #23 `difference-of-squares' now with entry in config.json

wobh/xlisp,TatriX/xlisp,verdammelt/xlisp,exercism/xlisp,verdammelt/xlisp,exercism/xlisp,TatriX/xlisp,wobh/xlisp