document the get active current executor method

Author: ktoso

include/swift/Runtime/Concurrency.h

@@ -901,8 +901,11 @@ struct ExecutorActiveAndRef {
   ExecutorRef ref;
 };
 
+/// Different than `swift_task_getCurrentExecutor` in that it does not default to the generic executor.
+/// This method is to be used if we are interested specifically IF we have an executor set in this context,
+/// and if so, which one it is. If no executor is available in the current context, the `active` bool will be false.
 SWIFT_EXPORT_FROM(swift_Concurrency) SWIFT_CC(swift)
-ExecutorActiveAndRef swift_task_getCurrentActiveExecutorRef();
+ExecutorActiveAndRef swift_task_getCurrentActiveExecutorRef(void);
 
 SWIFT_EXPORT_FROM(swift_Concurrency) SWIFT_CC(swift)
 void swift_task_reportUnexpectedExecutor(

stdlib/public/Concurrency/TaskGroup.swift

@@ -632,7 +632,6 @@ public struct ThrowingTaskGroup<ChildTaskResult: Sendable, Failure: Error> {
   ///     } catch {
   ///         // other errors though we print and cancel the group,
   ///         // and all of the remaining child tasks within it.
-  ///         print("Error: \(error)")
   ///         group.cancelAll()
   ///     }
   /// }