taskqueue: update DeleteMulti documentation
Update the DeleteMulti description to describe what happens when one of the deletes fails.
diff --git a/taskqueue/taskqueue.go b/taskqueue/taskqueue.go
index 9b62fac..5fed9b3 100644
--- a/taskqueue/taskqueue.go
+++ b/taskqueue/taskqueue.go
@@ -321,6 +321,8 @@
// DeleteMulti deletes multiple tasks from a named queue.
// If a given task could not be deleted, an appengine.MultiError is returned.
+// Each task is deleted independently; one may fail to delete while the others
+// are sucessfully deleted.
func DeleteMulti(c context.Context, tasks []*Task, queueName string) error {
taskNames := make([][]byte, len(tasks))
for i, t := range tasks {
