GreetingConcatenator.md

- import javax.inject.Inject
+ import me.tatarka.inject.annotations.Inject

 interface GreetingConcatenator {
   fun concatenate(greetings: Set<String>): String
 }

- class GreetingConcatenatorImpl @Inject constructor(
- ) : GreetingConcatenator {
+ @Inject
+ class GreetingConcatenatorImpl : GreetingConcatenator {
  override fun concatenate(greetings: Set<String>): String {
    return greetings.sorted().joinToString()
  }