Nuke some whitespace in observatory

runtime/observatory/lib/tracer.dart

 // Copyright (c) 2013, 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.
 
 library tracer;
 
 import 'dart:async';
 
 import 'package:logging/logging.dart';
 import 'package:observe/observe.dart';
@@ skipping 42 matching lines @@
     if (_current == null) {
       _current = new Tracer();
     }
   }
   static void stop() {
     if (_current != null) {
       _current.cancel();
       _current = null;
     }
   }
-  
+
   // The tracer subscribes to all logging events.
   StreamSubscription loggerSub = null;
 
   // The start time for the current request.
   Stopwatch _time;
 
   // A list of all tracing events for thre current request.
   ObservableList<TraceEvent> events = new ObservableList<TraceEvent>();
 
   Tracer() {
@@ skipping 12 matching lines @@
 
   void reset() {
     _time.reset();
     events.clear();
   }
 
   TraceEvent trace(String message, {Map map: null}) {
     var event = new TraceEvent.msg(_time.elapsedMicroseconds, message, map);
     events.add(event);
     return event;
-  } 
+  }
 }