message: docs(aio): fix extraneous divs
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diff: @@ -512,10 +512,6 @@ You rarely access Angular feature modules directly. You usually import them from
  ## NgModule
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  Helps you organize an application into cohesive blocks of functionality.
  An NgModule identifies the components, directives, and pipes that the application uses along with the list of external NgModules that the application needs, such as `FormsModule`.
  @@ -526,7 +522,7 @@ For details and examples, see [NgModules](guide/ngmodules) and the
  related files in that section.
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  {@a O}
  @@ -631,13 +627,10 @@ For more information, see the [Routing & Navigation](guide/router) page.
  ## Router module
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  A separate [NgModule](guide/glossary#ngmodule) that provides the necessary service providers and directives for navigating through application views.
  For more information, see the [Routing & Navigation](guide/router) page.
  -</div>
  ## Routing component
  