For consistency with Clojure, print the status and value for {{Reduced}}.
Clojure:
`
user=> (reduced 1)
object[clojure.lang.Reduced 0x28ec166e {:status :ready, :val 1}]
`
ClojureScript:
`
cljs.user=> (reduced 1)
object[cljs.core.Reduced]
`
See CLJS-2934