message: docs: fix the sequence of creating class in HTTP tutorial
  For more accurate procedure of creating a class in the "Tour of Heroes" app, updated the sequence of creating one class.
  PR Close
diff: @@ -56,8 +56,24 @@ Install the *In-memory Web API* package from _npm_
  npm install angular-in-memory-web-api --save
  </code-example>
  -Import the `HttpClientInMemoryWebApiModule` and the `InMemoryDataService` class,
  -which you will create in a moment.
  +
  +The class `src/app/in-memory-data.service.ts` is generated by the following command:
  +
  +<code-example language="sh" class="code-shell">
  + ng generate service InMemoryData
  +</code-example>
  +
  +This class has the following content:
  +
  +<code-example path="toh-pt6/src/app/in-memory-data.service.ts" region="init" header="src/app/in-memory-data.service.ts" linenums="false"></code-example>
  +
  +This file replaces `mock-heroes.ts`, which is now safe to delete.
  +
  +When your server is ready, detach the *In-memory Web API*, and the app's requests will go through to the server.
  +
  +Now back to the `HttpClient` story.
  +
  +Import the `HttpClientInMemoryWebApiModule` and the `InMemoryDataService` class.
  <code-example
  path="toh-pt6/src/app/app.module.ts"
  @@ -77,22 +93,6 @@ _after importing the `HttpClientModule`_,
  The `forRoot()` configuration method takes an `InMemoryDataService` class
  that primes the in-memory database.
  -The class `src/app/in-memory-data.service.ts` is generated by the following command:
  -
  -<code-example language="sh" class="code-shell">
  - ng generate service InMemoryData
  -</code-example>
  -
  -This class has the following content:
  -
  -<code-example path="toh-pt6/src/app/in-memory-data.service.ts" region="init" header="src/app/in-memory-data.service.ts" linenums="false"></code-example>
  -
  -This file replaces `mock-heroes.ts`, which is now safe to delete.
  -
  -When your server is ready, detach the *In-memory Web API*, and the app's requests will go through to the server.
  -
  -Now back to the `HttpClient` story.
  -
  {@a import-heroes}
  ## Heroes and HTTP
  