[DOC RouteInfo] Fix grammar, spelling, and formatting

(cherry picked from commit 8693674)

packages/@ember/-internals/routing/lib/services/router.ts

@@ -293,8 +293,8 @@ if (EMBER_ROUTING_ROUTER_SERVICE) {
       });
     },
 
-    /**
-     A RouteInfo that represents the current leaf route.
+  /**
+     A `RouteInfo` that represents the current leaf route.
      It is guaranteed to change whenever a route transition
      happens (even when that transition only changes parameters
      and doesn't change the active route)

packages/@ember/-internals/routing/lib/system/route-info.ts

@@ -42,7 +42,7 @@
 /**
   The ordered list of the names of the params
   required for this route. It will contain the same
-  strings as Object.keys(params), but here the order
+  strings as `Object.keys(params)`, but here the order
   is significant. This allows users to correctly pass
   params into routes programmatically.
   @property {Array} paramNames
@@ -153,9 +153,9 @@
 */
 
 /**
-  The values of the route's parametes. These are the
+  The values of the route's parameters. These are the
   same params that are received as arguments to the
-  route's model hook. Contains only the parameters
+  route's `model` hook. Contains only the parameters
   valid for this route, if any (params for parent or
   child routes are not merged).
   @property {Object} params
@@ -182,7 +182,7 @@
 */
 
 /**
-  A reference to the parent route's RouteInfo.
+  A reference to the parent route's `RouteInfo`.
   This can be used to traverse upward to the topmost
   `RouteInfo`.
   @property {RouteInfo|null} parent
@@ -191,7 +191,7 @@
 */
 
 /**
-  A reference to the child route's RouteInfo.
+  A reference to the child route's `RouteInfo`.
   This can be used to traverse downward to the
   leafmost `RouteInfo`.
   @property {RouteInfo|null} child
@@ -202,7 +202,9 @@
   of `RouteInfo`s from the topmost to leafmost.
   Returns the first `RouteInfo` in the linked list
   for which the callback returns true.
+*/
 
+/**
     This method is similar to the `find()` method
     defined in ECMAScript 2015.
 

packages/@ember/-internals/routing/lib/system/transition.ts

@@ -138,7 +138,7 @@
  * This property is a `RouteInfo` object that represents
  * where the router is transitioning to. It's important
  * to note that a `RouteInfo` is a linked list and this
- * property is simply represents leafmost route.
+ * property represents the leafmost route.
  * @property {RouteInfo|RouteInfoWithAttributes} to
  * @public
  * @category ember-routing-router-service
@@ -148,8 +148,8 @@
  * This property is a `RouteInfo` object that represents
  * where transition originated from. It's important
  * to note that a `RouteInfo` is a linked list and this
- * property is simply represents head node of the list.
- * In the case of an initial render, from will be set to
+ * property represents the head node of the list.
+ * In the case of an initial render, `from` will be set to
  * `null`.
  * @property {RouteInfoWithAttributes} from
  * @public