message: docs: apply suggestions from code review
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diff: @@ -212,8 +212,8 @@ The example template uses two built-in structural directives to add application
  | Directives | Details |
  |:--- |:--- |
  -| [`*ngFor`](guide/built-in-directives#ngFor) | An iterative, it tells Angular to stamp out one `<li>` per hero in the `heroes` list. |
  -| [`*ngIf`](guide/built-in-directives#ngIf) | A conditional, it includes the `HeroDetail` component only if a selected hero exists. |
  +| [`*ngFor`](guide/built-in-directives#ngFor) | An *iterative*, which tells Angular to create one `<li>` per hero in the `heroes` list. |
  +| [`*ngIf`](guide/built-in-directives#ngIf) | A *conditional*, which includes the `HeroDetail` component only if a selected hero exists. |
  #### Attribute directives
  