Make pub strong-mode clean.

lib/src/log.dart

 // Copyright (c) 2012, 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.
 
 /// Message logging.
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:args/command_runner.dart';
@@ skipping 381 matching lines @@
   stderr.writeln('---- End log transcript ----');
 }
 
 /// Prints [message] then displays an updated elapsed time until the future
 /// returned by [callback] completes.
 ///
 /// If anything else is logged during this (including another call to
 /// [progress]) that cancels the progress animation, although the total time
 /// will still be printed once it finishes. If [fine] is passed, the progress
 /// information will only be visible at [Level.FINE].
-Future progress(String message, Future callback(), {bool fine: false}) {
+Future/*<T>*/ progress/*<T>*/(String message, Future/*<T>*/ callback(),
+    {bool fine: false}) {
   _stopProgress();
 
   var progress = new Progress(message, fine: fine);
   _animatedProgress = progress;
   return callback().whenComplete(progress.stop);
 }
 
 /// Stops animating the running progress indicator, if currently running.
 void _stopProgress() {
   if (_animatedProgress != null) _animatedProgress.stopAnimating();
@@ skipping 239 matching lines @@
       message(_firstMessage);
     } else {
       message(_template.replaceAll("##", _count.toString()));
     }
   }
 
   void _initTimer() {
     _timer = new Timer(_window, end);
   }
 }