text: var fs = require('fs');
  fs.readFile('./index.js', 'utf-8', function(err, data) {
      var newData = data.replace(/\/\*[\s\S]*\*\//,'');
      fs.writeFile('./index.copy.js', newData, function(err) {
          if(!err) {
              console.log('Write file success')
          }
      })
  })