wip: polish some more things

examples/hello_world.rs

@@ -4,7 +4,7 @@ fn main() {
     dioxus::desktop::launch(app);
 }
 
-fn app(cx: Scope<()>) -> Element {
+fn app(cx: Scope) -> Element {
     cx.render(rsx! (
         div { "Hello, world!" }
     ))