message: docs(aio): fix "Error handling" section in "HttpClient"
  Removed additional curly brackets to fix blocks. Also replaced tab with 2 spaces.
  PR Close
diff: @@ -126,7 +126,7 @@ http
  err => {
  console.log('Something went wrong!');
  }
  - });
  + );
  ```
  #### Getting error details
  @@ -152,7 +152,7 @@ http
  console.log(`Backend returned code ${err.status}, body was: ${err.error}`);
  }
  }
  - });
  + );
  ```
  #### `.retry()`
  