docs(ts/_cache): misc sync (#2971)

* docs(toh-5): backport cache change to main jade file

* docs(ts/_cache): misc sync

public/docs/ts/_cache/glossary.jade

@@ -250,7 +250,7 @@ a#aot
     and returns a fully prepared instance of "A".
 
     Angular provides and relies upon its own sophisticated
-    [dependency injection](dependency-injection.html) system
+    [dependency injection](!{docsLatest}/guide/dependency-injection.html) system
     to assemble and run applications by "injecting" application parts
     into other application parts where and when needed.
 

public/docs/ts/_cache/tutorial/toh-pt6.jade

@@ -91,10 +91,9 @@ block http-providers
 
 block backend
   :marked
-    We're importing the  `InMemoryWebApiModule` and adding it to the module `imports`.
-    The  `InMemoryWebApiModule` replaces the default `Http` client backend —
-    the supporting service that talks to the remote server —
-    with an  _in-memory web API alternative service_.
+    Rather than require a real API server, this example simulates communication with the remote server by adding the
+    <a href="https://github.com/angular/in-memory-web-api" target="_blank" title="In-memory Web API"><i>InMemoryWebApiModule</i></a>
+    to the module `imports`, effectively  replacing the `Http` client's XHR backend service with an in-memory alternative.
 
   +makeExcerpt(_appModuleTsVsMainTs, 'in-mem-web-api', '')
 

public/docs/ts/latest/tutorial/toh-pt5.jade

@@ -775,7 +775,7 @@ block heroes-component-cleanup
 :marked
   ### Update the _HeroesComponent_ class.
 
-  The `HeroesComponent` navigates to the `HeroesDetailComponent` in response to a button click. 
+  The `HeroesComponent` navigates to the `HeroDetailComponent` in response to a button click. 
   The button's _click_ event is bound to a `gotoDetail` method that navigates _imperatively_
   by telling the router where to go.