Discrepencies between doc and code

https://github.com/kotlin-hands-on/intro-coroutines/blob/solutions/src/tasks/Request5Concurrent.kt  .
and 
https://play.kotlinlang.org/hands-on/Introduction%20to%20Coroutines%20and%20Channels/05_Concurrency  (section solution)

The documentation does not have service as a parameter, code and solution do.

It seems that all the chapters of the documentation have the same issue.
