Error in cookbook custom log format example

[wtfleming]

At http://pedestal.io/cookbook/index#_custom_log_format

In the code example

(def log-request
  "Logs all http requests with response time."
  {:name ::log-request
   :enter (fn [context]
              (assoc-in context [:request :start-time] (System/currentTimeMillis)))
   :leave (fn [context]
              (let [{:keys [uri start-time request-method]} (:request context)
                    finish (System/currentTimeMillis)
                    total (- finish start-time)]
                   (log/info :msg "request completed"
                             :method (clojure.string/upper-case (name request-method))
                             :uri uri
                             :status (:status (:response context))
                             :response-time total)))})

The function associated with :leave should return context?