message: docs(docs-infra): replace a comma with a period at the end of a sentence
  In order to keep document consistency this commit replaces a comma with a period at the end of a sentence
  PR Close
diff: @@ -95,7 +95,7 @@ or in the `@NgModule()` or `@Component()` metadata
  Registering the provider in the `@Injectable()` metadata also allows Angular to optimize an app
  by removing the service from the compiled app if it isn't used.
  -* When you register a provider with a [specific NgModule](guide/architecture-modules), the same instance of a service is available to all components in that NgModule. To register at this level, use the `providers` property of the `@NgModule()` decorator,
  +* When you register a provider with a [specific NgModule](guide/architecture-modules), the same instance of a service is available to all components in that NgModule. To register at this level, use the `providers` property of the `@NgModule()` decorator.
  ```
  @NgModule({
  