Here is output from Clojure 1.8.0:
Here is the corresponding output from Clojure 1.9.0:
This repetition only occurs when calling clojure.repl/doc or clojure.repl/print-doc for special form symbols, not for other symbols like macros and functions. It was introduced when modifying clojure.repl/print-doc when adding the ability to print specs in its output, and the fix is straightforward.
Prescreened by: Alex Miller