finish router refrence

docs/router/src/reference/history-providers.md

@@ -1,43 +1,20 @@
 # History Providers
 
-In order to provide the ability to traverse the navigation history, the router
-uses [`HistoryProvider`]s. Those implement the actual back-and-forth
-functionality.
+[`HistoryProvider`]s are used by the router to keep track of the navigation history
+and update any external state (e.g. the browser's URL).
 
 The router provides five [`HistoryProvider`]s, but you can also create your own.
 The five default implementations are:
 
 - The [`MemoryHistory`] is a custom implementation that works in memory.
-- The [`WebHistory`] integrates with the browsers URL.
+- The [`WebHistory`] integrates with the browser's URL.
 
-By default the router uses the [`MemoryHistory`]. It might be changed to use
+By default, the router uses the [`MemoryHistory`]. It might be changed to use
 [`WebHistory`] when the `web` feature is active, but that is not guaranteed.
 
 You can override the default history:
 
 ```rust, no_run
-# // Hidden lines (like this one) make the documentation tests work.
-# extern crate dioxus;
-use dioxus::prelude::*;
-# extern crate dioxus_router;
-use dioxus_router::{prelude::*, history::WebHashHistory};
-
-fn App(cx: Scope) -> Element {
-    use_router(
-        cx,
-        &|| RouterConfiguration {
-            history: Box::new(WebHashHistory::new(true)),
-            ..Default::default()
-        },
-        &|| Segment::empty()
-    );
-
-    render! {
-        Outlet { }
-    }
-}
+{{#include ../../examples/history_provider.rs:app}}
 ```
 
-[`HistoryProvider`]: https://docs.rs/dioxus-router-core/latest/dioxus_router_core/history/trait.HistoryProvider.html
-[`MemoryHistory`]: https://docs.rs/dioxus-router-core/latest/dioxus_router_core/history/struct.MemoryHistory.html
-[`WebHistory`]: https://docs.rs/dioxus-router-core/latest/dioxus_router_core/history/struct.WebHistory.html