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I was reading the code on https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/RT.java#L556 and wondering why is this there since its not used, just minor :nail-care:

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+1 vote

I do not know, but if you go back through git log history of changes to that file, both it and the line above were added with the same commit by Rich Hickey on 2009-Feb-17. I would not be surprised if an earlier uncommitted version of the println statement immediately afterwards used it in its output, but was removed before the code was committed.