old_contents: 'use strict';
  
  const express = require('express');
  const app = module.exports = express();
  
  const cors = require('../').middleware;
  
  // enabled cors headers
  app.use(cors);
  
  // normal route
  app.get('/', (req, res) => {
    res.send('Hello World');
  });
  
  // handle cors errors
  app.use((err, req, res, next) => { // eslint-disable-line no-unused-vars
    res.status(err.code).send(err.toString());
  });
  
  /* istanbul ignore next */
  if (!module.parent) {
    app.listen(3000);
    console.log('Express started on port 3000'); // eslint-disable-line no-console
  }
  
new_contents: 'use strict';
  
  const express = require('express');
  const cors = require('../').middleware;
  
  const app = module.exports = express();
  
  // enabled cors headers
  app.use(cors);
  
  // normal route
  app.get('/', (req, res) => {
    res.send('Hello World');
  });
  
  // handle cors errors
  app.use((err, req, res, next) => { // eslint-disable-line no-unused-vars
    res.status(err.code).send(err.toString());
  });
  
  /* istanbul ignore next */
  if (!module.parent) {
    app.listen(3000);
    console.log('Express started on port 3000'); // eslint-disable-line no-console
  }
  
subject: resolve import/newline-after-import error