Change generic comment syntax to real generic syntax.

lib/src/stream_group.dart

Index: lib/src/stream_group.dart
diff --git a/lib/src/stream_group.dart b/lib/src/stream_group.dart
index 889ccd82685af96a2e5933b9228231804bd50bc6..4aa448e303e9513a8f99e98c87ef56451ea3e483 100644
--- a/lib/src/stream_group.dart
+++ b/lib/src/stream_group.dart
@@ -53,8 +53,8 @@ class StreamGroup<T> implements Sink<Stream<T>> {
   ///
   /// This is equivalent to adding [streams] to a group, closing that group, and
   /// returning its stream.
-  static Stream/*<T>*/ merge/*<T>*/(Iterable<Stream/*<T>*/> streams) {
-    var group = new StreamGroup/*<T>*/();
+  static Stream<T> merge<T>(Iterable<Stream<T>> streams) {
+    var group = new StreamGroup<T>();
     streams.forEach(group.add);
     group.close();
     return group.stream;