Properly shorten library names on Windows.

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 'utils.dart';
 import 'vm_trace.dart';
 
-final _terseRegExp = new RegExp(r"(-patch)?(/.*)?$");
+final _terseRegExp = new RegExp(r"(-patch)?([/\\].*)?$");
 
 /// A RegExp to match V8's stack traces.
 ///
 /// V8's traces start with a line that's either just "Error" or else is a
 /// description of the exception that occurred. That description can be multiple
 /// lines, so we just look for any line other than the first that begins with
 /// three or four spaces and "at".
 final _v8Trace = new RegExp(r"\n    ?at ");
 
 /// A RegExp to match indidual lines of V8's stack traces.
@@ skipping 260 matching lines @@
     // Figure out the longest path so we know how much to pad.
     var longest = frames.map((frame) => frame.location.length)
         .fold(0, math.max);
 
     // Print out the stack trace nicely formatted.
     return frames.map((frame) {
       return '${padRight(frame.location, longest)}  ${frame.member}\n';
     }).join();
   }
 }