Avoid warnings about unknown props in new React

examples/todomvc/src/todomvc/core.cljs

@@ -31,14 +31,15 @@
         save #(let [v (-> @val str clojure.string/trim)]
                 (if-not (empty? v) (on-save v))
                 (stop))]
-    (fn [props]
-      [:input (merge props
-                     {:type "text" :value @val :on-blur save
+    (fn [{:keys [id class placeholder]}]
+      [:input {:type "text" :value @val
+               :id id :class class :placeholder placeholder
+               :on-blur save
                :on-change #(reset! val (-> % .-target .-value))
                :on-key-down #(case (.-which %)
                                13 (save)
                                27 (stop)
-                                      nil)})])))
+                               nil)}])))
 
 (def todo-edit (with-meta todo-input
                  {:component-did-mount #(.focus (r/dom-node %))}))