Don't print namespaces with symbols. This is particularly useful when pretty printing the results of macro expansions
(require '[clojure.pprint :as pp])
(defmacro plus [n1 n2]
`(+ ~n1 ~n2))
(macroexpand-1 '(plus 3 4))
;=> (clojure.core/+ 3 4)
(alter-var-root #'pp/*print-suppress-namespaces* (constantly true))
(macroexpand-1 '(plus 3 4))
;=> (clojure.core/+ 3 4)
;; comes into effect only in pprint.
(pp/pprint (macroexpand-1 '(plus 3 4)))
;=> (+ 3 4)