Changes for clojure.core/gensym

zkim on Sun, 26 Sep 2010
user=> (gensym "foo")
foo2020

user=> (gensym "foo")
foo2027

user=> (gensym "foo")
;; ...
defn on Mon, 02 Aug 2010
(gensym "foo")
; => foo2020

(gensym "foo")
; => foo2027

(gensym "foo")
; => ...