Changes for clojure.set/subset?

dakrone on Wed, 29 Dec 2010
user> (clojure.set/subset? #{2 3} #{1 2 3 4})
true

user> (clojure.set/subset? #{2 4} #{1 2 3 4})
true

user> (clojure.set/subset? #{2 5} #{1 2 3 4})
false