pkg/docgen: moved model classes into minilibs

pkg/docgen/lib/src/exports/libraries.dart

Index: pkg/docgen/lib/src/exports/libraries.dart
diff --git a/tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart b/pkg/docgen/lib/src/exports/libraries.dart
similarity index 70%
copy from tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart
copy to pkg/docgen/lib/src/exports/libraries.dart
index 16da6e3295bca2daa89abcf7104d7a492f7cd846..00163dfb8bb6a25cd35fca566c394c39e1630b9c 100644
--- a/tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart	
+++ b/pkg/docgen/lib/src/exports/libraries.dart
@@ -2,8 +2,6 @@
 // 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 spaces;
+library docgen.exports.libraries;
 
-part "part space/part space.dart";
-
-foo() => bar();
+export '../../../../../sdk/lib/_internal/libraries.dart';