pkg/docgen: the big refactor

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

+// 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 test_lib.foo;
 
 import 'test_lib.dart';
 
 /**
  * Doc comment for class [B].
  *
  * Multiline Test
  */
 
@@ skipping 17 matching lines @@
    * Test for linking to parameter [c]
    */
   void doThis(int c) {
     print(c);
   }
 }
 
 int testFunc(int a) {
   return a;
 }