changed __string__ to __repr__ in Closure class
changed __string__ to __repr__ in Closure class

fatso83/diy-lisp,kvalle/diy-lisp,couchemar/diy-lisp,beni55/diy-lisp,rcanepa/diy-lisp,couchemar/diy-lisp,kvalle/diy-lisp,fatso83/diy-lisp,kvalle/diy-lang,joelchelliah/diy-lisp,codecop/diy-lang,rcanepa/diy-lisp,joelchelliah/diy-lisp,beni55/diy-lisp,kvalle/diy-lang,codecop/diy-lang