Nuke some whitespace in observatory

runtime/observatory/lib/tracer.dart

Index: runtime/observatory/lib/tracer.dart
diff --git a/runtime/observatory/lib/tracer.dart b/runtime/observatory/lib/tracer.dart
index 1453c3c0028672c9383204aea3c2df490888ce92..ffe08929f6fb22ef86cc1f7dbf854e9fe556fb77 100644
--- a/runtime/observatory/lib/tracer.dart
+++ b/runtime/observatory/lib/tracer.dart
@@ -60,7 +60,7 @@ class Tracer extends Observable {
       _current = null;
     }
   }
-  
+
   // The tracer subscribes to all logging events.
   StreamSubscription loggerSub = null;
 
@@ -93,5 +93,5 @@ class Tracer extends Observable {
     var event = new TraceEvent.msg(_time.elapsedMicroseconds, message, map);
     events.add(event);
     return event;
-  } 
+  }
 }