message: docs: replaced erroneous instances of `HeroDetailsComponent` with `HeroDetailComponent`
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diff: @@ -259,8 +259,8 @@ After the browser refreshes you can navigate freely between the two views by cli
  {@a hero-details}
  ## Navigating to hero details
  -The `HeroDetailsComponent` displays details of a selected hero.
  -At the moment the `HeroDetailsComponent` is only visible at the bottom of the `HeroesComponent`
  +The `HeroDetailComponent` displays details of a selected hero.
  +At the moment the `HeroDetailComponent` is only visible at the bottom of the `HeroesComponent`
  The user should be able to get to these details in three ways.
  @@ -268,7 +268,7 @@ The user should be able to get to these details in three ways.
  1. By clicking a hero in the heroes list.
  1. By pasting a "deep link" URL into the browser address bar that identifies the hero to display.
  -In this section, you'll enable navigation to the `HeroDetailsComponent`
  +In this section, you'll enable navigation to the `HeroDetailComponent`
  and liberate it from the `HeroesComponent`.
  ### Delete _hero details_ from `HeroesComponent`
  