Change generic comment syntax to real generic syntax.

lib/src/typed_stream_transformer.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import 'delegate/stream.dart';
 
 /// Creates a wrapper that coerces the type of [transformer].
 ///
 /// This soundly converts a [StreamTransformer] to a `StreamTransformer<S, T>`,
 /// regardless of its original generic type, by asserting that the events
 /// emitted by the transformed stream are instances of `T` whenever they're
 /// provided. If they're not, the stream throws a [CastError].
-StreamTransformer/*<S, T>*/ typedStreamTransformer/*<S, T>*/(
+StreamTransformer<S, T> typedStreamTransformer<S, T>(
         StreamTransformer transformer) =>
-    transformer is StreamTransformer/*<S, T>*/
+    transformer is StreamTransformer<S, T>
         ? transformer
         : new _TypeSafeStreamTransformer(transformer);
 
 /// A wrapper that coerces the type of the stream returned by an inner
 /// transformer.
 class _TypeSafeStreamTransformer<S, T> implements StreamTransformer<S, T> {
   final StreamTransformer _inner;
 
   _TypeSafeStreamTransformer(this._inner);
 
   Stream<T> bind(Stream<S> stream) =>
       DelegatingStream.typed(_inner.bind(stream));
 }