Fix formatting of #'router docstring

[frenchy64]

Escaped double quotes breaks the clojure.repl/doc output.

Before:

      (router
        ["/api" {:middleware [wrap-format wrap-oauth2]}
          ["/users" {:get get-user
                       :post update-user
                       :delete {:middleware [wrap-delete]
                               :handler delete-user}}]])

After:

      (router
        ["/api" {:middleware [wrap-format wrap-oauth2]}
         ["/users" {:get get-user
                    :post update-user
                    :delete {:middleware [wrap-delete]
                             :handler delete-user}}]])