message: docs(aio): fix adding to template driven forms
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diff: @@ -268,7 +268,7 @@ First we must create a directive that will wrap the validator function. We provi
  <code-example path="form-validation/src/app/shared/identity-revealed.directive.ts" region="cross-validation-directive" title="shared/identity-revealed.directive.ts" linenums="false">
  </code-example>
  -Next, we have to add the directive to the html template. Since the validator must be registered at the `FormGroup` level, we put the directive on the `form` tag.
  +Next, we have to add the directive to the html template. Since the validator must be registered at the highest level in the form, we put the directive on the `form` tag.
  <code-example path="form-validation/src/app/template/hero-form-template.component.html" region="cross-validation-register-validator" title="template/hero-form-template.component.html" linenums="false">
  </code-example>
  