Changes for clojure.core/swap!

esumitra on Tue, 19 Aug 2014
;; swap map values
user> (def m1 (atom {:a "A" :b "B"}))
atom

user> @m1
{:a "A", :b "B"}

user> (swap! m1 assoc :a "Aaay")
{:a "Aaay", :b "B"}