Makes code clearing by providing code symmetry.

```            
child.push(&JsValue::from(&item.title));
child.push(&JsValue::from(item.completed));
child.push(&JsValue::from(&item.id));
```
Parallel syntax makes it easier to see that each iteration intends to push each of `item`'s fields to `child`.

examples/todomvc/src/store.rs

@@ -62,7 +62,7 @@ impl Store {
             let child = js_sys::Array::new();
             child.push(&JsValue::from(&item.title));
             child.push(&JsValue::from(item.completed));
-            child.push(&JsValue::from(item.id.to_string()));
+            child.push(&JsValue::from(&item.id));
 
             array.push(&JsValue::from(child));
         }