docs(toh): fix some header extensions

closes #1549

Author: Foxandxss

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

@@ -259,12 +259,12 @@ figure.image-display
   As we noted above, that is the component's cue to create and present an empty hero.
 
   Add the following HTML to the `heroes.component.html`, just below the hero list (the `*ngFor`).
-+makeExample('toh-6/ts/app/heroes.component.html', 'add-hero', 'app/heroes.component.ts (add)')(format=".")
++makeExample('toh-6/ts/app/heroes.component.html', 'add-hero', 'app/heroes.component.html (add)')(format=".")
 :marked
   The user can *delete* an existing hero by clicking a delete button next to the hero's name.
 
   Add the following HTML to the `heroes.component.html` right after the name in the repeated `<li>` tag:
-+makeExample('toh-6/ts/app/heroes.component.html', 'delete-hero', 'app/heroes.component.ts (delete)')(format=".")
++makeExample('toh-6/ts/app/heroes.component.html', 'delete-hero', 'app/heroes.component.html (delete)')(format=".")
 
 :marked
   Now let's fix-up the `HeroesComponent` to support the *add* and *delete* actions in the template.