move JDBC example after showing C3 contents

Author: seancorfield

README.md

@@ -148,14 +148,15 @@ The expectation is that you use _either_ `clojure.core.cache` _or_
     ;; to return the looked up value, possibly after calling the passed in
     ;; function with the key to populate the cache if the key wasn't present:
     (w/lookup-or-miss C3 :b (constantly 42))
-    ;; calls (jdbc/get-by-id :storage my-key) in the event of a cache miss:
-    (w/lookup-or-miss C3 my-key (partial jdbc/get-by-id db-spec :storage))
 
     ;=> 42
 
     @C3
 
     ;=> {:a 1, :d 13, :b 42}
+
+    ;; calls (jdbc/get-by-id :storage my-key) in the event of a cache miss:
+    (w/lookup-or-miss C3 my-key (partial jdbc/get-by-id db-spec :storage))
 ```
 
 Refer to docstrings in the `clojure.core.cache` or `clojure.core.cache.wrapped` namespaces, or the [autogenerated API documentation](http://clojure.github.io/core.cache/) for additional documentation.