pkg/dartdoc: moving files around, fix library names

pkg/docgen/lib/src/mdn.dart

Index: pkg/docgen/lib/src/mdn.dart
diff --git a/pkg/docgen/lib/src/mdn.dart b/pkg/docgen/lib/src/mdn.dart
index 77d24f1d06f36a6a02c183f8151a6e96fa378b73..073dbdd34165a7101d2e42a394f02a49b98a23c4 100644
--- a/pkg/docgen/lib/src/mdn.dart
+++ b/pkg/docgen/lib/src/mdn.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2014, 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 docgen.mdn;
 
 import 'dart:convert';