Reword the documentation for StreamQueue.cancel.
R=floitsch@google.com
Review URL: https://codereview.chromium.org//1243783003 .
diff --git a/lib/src/stream_queue.dart b/lib/src/stream_queue.dart
index e4b3b64..36d03ef 100644
--- a/lib/src/stream_queue.dart
+++ b/lib/src/stream_queue.dart
@@ -223,8 +223,8 @@
/// subscription providing the events.
///
/// If [immediate] is `true`, the subscription is instead canceled
- /// immediately. Any pending events are completed as though the underlying
- /// stream had closed.
+ /// immediately. Any pending events complete with a 'closed'-event, as though
+ /// the stream had closed by itself.
///
/// The returned future completes with the result of calling
/// `cancel`.
