[Suggestion] Difficulty with "Iteration can be used for repetition"

[zackteo]

Newbie here and I was stumped at this.

Should we perhaps follow clojure koans to use str (shown below) instead of identity / (fn [x] x) ? Either that or introduce the identity function earlier?

https://github.com/adomixaszvers/clojure-koans/commit/847b095ddf2fe5f846f5995fcdc2c56eb8b49941