Additional clarification on consumeEach vs for loop iteration

Author: elizarov

coroutines-guide.md

@@ -1571,6 +1571,11 @@ Processor #3 received 10
 Note, that cancelling a producer coroutine closes its channel, thus eventually terminating iteration
 over the channel that processor coroutines are doing.
 
+Also, pay attention to how we explicitly iterate over channel with `for` loop to perform fan-out in `launchProcessor` code. 
+Unlike `consumeEach`, this `for` loop pattern is perfectly safe to use from multiple coroutines. If one of the processor 
+coroutines fails, then others would still be processing the channel, while a processor that is written via `consumeEach` 
+always consumes (cancels) the underlying channel on its normal or abnormal termination.     
+
 ### Fan-in
 
 Multiple coroutines may send to the same channel.