functional-koans/clojure-koans — pull request #65 by kylev (2013-12-03 19:22:49+00:00)
Title: Switch variable from index to x to avoid confusing syntax highlightig.

index is a clojure.set function and ended up highlighted for me, sending me
down a rabbit hole of confusion. Avoid this with a more generic variable name
consistent with other Koan files.