message: docs: Remove redundant sentence from Router
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diff: In a single-page app, you change what the user sees by showing or hiding portions of the display that correspond to particular components, rather than going out to the server to get a new page.
  As users perform application tasks, they need to move between the different [views](guide/glossary#view "Definition of view") that you have defined.
  -To implement this kind of navigation within the single page of your app, you use the Angular **`Router`**.
  -To handle the navigation from one [view](guide/glossary#view) to the next, you use the Angular _router_.
  -The router enables navigation by interpreting a browser URL as an instruction to change the view.
  +To handle the navigation from one [view](guide/glossary#view) to the next, you use the Angular **`Router`**.
  +The **`Router`** enables navigation by interpreting a browser URL as an instruction to change the view.
  To explore a sample app featuring the router's primary features, see the <live-example></live-example>.
  