Comparing Clojure persistent sets to Java sets implementing java.util.Set interface returns true if the set of elements are the same, but not for data.avl sorted-sets.
`
user=> (def jset1 (java.util.HashSet. [5 7 11]))
'user/jset1
user=> (def avlset1 (avl/sorted-set 5 7 11))
'user/avlset1
user=> avlset1
{5 7 11}
user=> (def cset1 #{5 7 11})
'user/cset1
user=> (= cset1 jset1)
true
user=> (= jset1 cset1)
true
;; One might also expect true from comparisons below, like for the two above
user=> (= avlset1 jset1)
false
user=> (= jset1 avlset1)
false
`
