pkg/docgen: fixed type references within typedef doc comments

pkg/docgen/test/multi_library_code/lib/root_lib.dart

Index: pkg/docgen/test/multi_library_code/lib/root_lib.dart
diff --git a/tests/compiler/dart2js/path with spaces/library space/part space/part space.dart b/pkg/docgen/test/multi_library_code/lib/root_lib.dart
similarity index 68%
copy from tests/compiler/dart2js/path with spaces/library space/part space/part space.dart
copy to pkg/docgen/test/multi_library_code/lib/root_lib.dart
index 58aff0fb6e8a8e53197e400cf859718ce5e65606..0a79b4707b62165fe2ca491fa5ed1d7f6fad5a75 100644
--- a/tests/compiler/dart2js/path with spaces/library space/part space/part space.dart	
+++ b/pkg/docgen/test/multi_library_code/lib/root_lib.dart
@@ -2,6 +2,8 @@
 // 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.
 
-part of spaces;
+library root_lib;
 
-bar() => 499;
+export 'test_lib.dart';
+export 'test_lib_foo.dart';
+export 'test_lib_bar.dart';