doc: add hint to seed::update that there is App::update

Author: flosse

src/util.rs

@@ -109,6 +109,7 @@ pub fn error<D: fmt::Debug>(text: D) {
 /// Trigger update function.
 /// It requires Msg to be (De)serializable
 /// and to register `trigger_update_handler` in `window_events`.
+/// Consider to use [`App::update`](struct.App.html#method.update) if you have access to the [`App`](struct.App.html) instance.
 pub fn update<Ms>(msg: Ms)
 where
     Ms: Clone + 'static + serde::Serialize,

src/vdom.rs

@@ -423,6 +423,9 @@ impl<Ms, Mdl, ElC: ElContainer<Ms> + 'static> App<Ms, Mdl, ElC> {
     /// We re-render the virtual DOM on every change, but (attempt to) only change
     /// the actual DOM, via web_sys, when we need.
     /// The model stored in inner is the old model; updated_model is a newly-calculated one.
+    ///
+    /// If you have no access to the [`App`](struct.App.html) instance you can use
+    /// alternatively the [`seed::update`](fn.update.html) function.
     pub fn update(&self, message: Ms) {
         let mut msg_and_cmd_queue: VecDeque<Effect<Ms>> = VecDeque::new();
         msg_and_cmd_queue.push_front(message.into());