Hook into `paredit-space-for-delimiter-predicates`

In nrepl-mode, paredit inserts some inappropriate spaces, e.g. before the `{` in a Clojure set literal, `#{...}`. I've just copied how clojure-mode handles the situation: https://github.com/technomancy/clojure-mode/commit/8699952eb18ab4c739e8f7462b3326d93bd0095c

Does this sort of customization belong in `nrepl.el`, or someplace else, like your init file?