Update comment style generic syntax

BUG=
R=kevmoo@google.com

Review-Url: https://codereview.chromium.org//2987963002 .

pkgs/stream_channel/lib/src/stream_channel_transformer.dart

diff --git a/pkgs/stream_channel/lib/src/stream_channel_transformer.dart b/pkgs/stream_channel/lib/src/stream_channel_transformer.dart
index 46232d7..d6d10ff 100644
--- a/pkgs/stream_channel/lib/src/stream_channel_transformer.dart
+++ b/pkgs/stream_channel/lib/src/stream_channel_transformer.dart
@@ -41,9 +41,9 @@
   /// throws a [CastError]. This also means that calls to [StreamSink.add] on
   /// the transformed channel's sink may throw a [CastError] if the argument
   /// type doesn't match the reified type of the sink.
-  static StreamChannelTransformer/*<S, T>*/ typed/*<S, T>*/(
+  static StreamChannelTransformer<S, T> typed<S, T>(
           StreamChannelTransformer transformer) =>
-      transformer is StreamChannelTransformer/*<S, T>*/
+      transformer is StreamChannelTransformer<S, T>
           ? transformer
           : new TypeSafeStreamChannelTransformer(transformer);
 

pkgs/stream_channel/lib/stream_channel.dart

diff --git a/pkgs/stream_channel/lib/stream_channel.dart b/pkgs/stream_channel/lib/stream_channel.dart
index 34be085..dcbc9a0 100644
--- a/pkgs/stream_channel/lib/stream_channel.dart
+++ b/pkgs/stream_channel/lib/stream_channel.dart
@@ -108,8 +108,8 @@
   /// Transforms [this] using [transformer].
   ///
   /// This is identical to calling `transformer.bind(channel)`.
-  StreamChannel/*<S>*/ transform/*<S>*/(
-      StreamChannelTransformer<dynamic/*=S*/, T> transformer);
+  StreamChannel<S> transform<S>(
+      StreamChannelTransformer<S, T> transformer);
 
   /// Transforms only the [stream] component of [this] using [transformer].
   StreamChannel<T> transformStream(StreamTransformer<T, T> transformer);
@@ -130,7 +130,7 @@
   /// If any events emitted by [stream] aren't of type [S], they're converted
   /// into [CastError] events. Similarly, if any events are added to [sync] that
   /// aren't of type [S], a [CastError] is thrown.
-  StreamChannel/*<S>*/ cast/*<S>*/();
+  StreamChannel<S> cast<S>();
 }
 
 /// An implementation of [StreamChannel] that simply takes a stream and a sink
@@ -153,8 +153,8 @@
     other.stream.pipe(sink);
   }
 
-  StreamChannel/*<S>*/ transform/*<S>*/(
-          StreamChannelTransformer<dynamic/*=S*/, T> transformer) =>
+  StreamChannel<S> transform<S>(
+          StreamChannelTransformer<S, T> transformer) =>
       transformer.bind(this);
 
   StreamChannel<T> transformStream(StreamTransformer<T, T> transformer) =>
@@ -169,6 +169,6 @@
   StreamChannel<T> changeSink(StreamSink<T> change(StreamSink<T> sink)) =>
       new StreamChannel.withCloseGuarantee(stream, change(sink));
 
-  StreamChannel/*<S>*/ cast/*<S>*/() => new StreamChannel(
+  StreamChannel<S> cast<S>() => new StreamChannel(
       DelegatingStream.typed(stream), DelegatingStreamSink.typed(sink));
 }

pkgs/stream_channel/pubspec.yaml

diff --git a/pkgs/stream_channel/pubspec.yaml b/pkgs/stream_channel/pubspec.yaml
index 7d395a3..19a3bd0 100644
--- a/pkgs/stream_channel/pubspec.yaml
+++ b/pkgs/stream_channel/pubspec.yaml
@@ -1,10 +1,10 @@
 name: stream_channel
-version: 1.6.1
+version: 1.6.2-dev
 description: An abstraction for two-way communication channels.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/stream_channel
 environment:
-  sdk: '>=1.8.0 <2.0.0'
+  sdk: '>=1.21.0 <2.0.0-dev.infinity'
 dependencies:
   async: '^1.11.0'
   stack_trace: '^1.0.0'