Get rid of all the library tags.

lib/src/trace.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 trace;
-
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'chain.dart';
 import 'frame.dart';
 import 'lazy_trace.dart';
 import 'unparsed_frame.dart';
 import 'utils.dart';
 import 'vm_trace.dart';
 
@@ skipping 274 matching lines @@
     var longest = frames.map((frame) => frame.location.length)
         .fold(0, math.max);
 
     // Print out the stack trace nicely formatted.
     return frames.map((frame) {
       if (frame is UnparsedFrame) return "$frame\n";
       return '${padRight(frame.location, longest)}  ${frame.member}\n';
     }).join();
   }
 }