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docs: fix typo in singleton services guide (#27948) 

PR Close #27948
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javatutorials2016 2019-01-05 23:43:38 -05:00 committed by Andrew Kushnir
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aio/content/guide/singleton-services.md
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@ -17,7 +17,7 @@ There are two ways to make a service a singleton in Angular:
* Declare that the service should be provided in the application root.
* Include the service in the `AppModule` or in a module that is only imported by the `AppModule`.
Beginning with Angular 6.0, the preferred way to create a singleton services is to specify on the service that it should be provided in the application root. This is done by setting `providedIn` to `root` on the service's `@Injectable` decorator:
Beginning with Angular 6.0, the preferred way to create a singleton service is to specify on the service that it should be provided in the application root. This is done by setting `providedIn` to `root` on the service's `@Injectable` decorator:
<code-example path="providers/src/app/user.service.0.ts" header="src/app/user.service.0.ts" linenums="false"> </code-example>