anchor.diff:    print("  pub run test -N $libName");
   }
   
  -String _generateStub(String libName, String className) => """
  +String _generateLib(String libName, String className) => """
   // Copyright (c) 2017, 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.
  
positive.code: class $className extends LintRule {
    $className() : super(
            name: '$libName',
              description: desc,
              details: details,
              group: Group.style);
  
    @override
  
negative.code: import 'package:analyzer/dart/ast/ast.dart';
  import 'package:analyzer/dart/ast/visitor.dart';
  import 'package:linter/src/analyzer.dart';
  import 'package:linter/src/util/dart_type_utilities.dart';
  
  const _desc = r' ';
  
  const _details = r'''
  
  **DO** ...
  
  