docs(router): formatting - Back Quote to Wrap Identifier

closes #2020

Author: mattezell

public/docs/ts/latest/guide/router.jade

@@ -166,8 +166,8 @@ code-example(format="", language="html").
    the `RouterLink` if we so desired.
 :marked
   ### Router State
-  After the end of each successful navigation lifecycle, the router builds a tree of `ActivatedRoute`s,
-  which make up the current state of the router. We can access the current `RouterState` from anywhere in our
+  After the end of each successful navigation lifecycle, the router builds a tree of `ActivatedRoute` objects
+  that make up the current state of the router. We can access the current `RouterState` from anywhere in our
   application using the `Router` service and the `routerState` property.
 
   The router state provides us with methods to traverse up and down the route tree from any activated route