old_contents: const path = require('path');
  const CopyWebpackPlugin = require('copy-webpack-plugin');
  
  module.exports = {
    context: __dirname,
    entry: path.resolve(__dirname, 'src/index.jsx'),
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: 'bundle.js',
    },
    devtool: 'source-map',
    resolve: {
      extensions: ['.js', '.jsx', '.json'],
    },
    module: {
      rules: [
        {
          test: /\.jsx?$/,
          loader: 'babel-loader',
        },
      ],
    },
    plugins: [
      new CopyWebpackPlugin([
        {
          from: path.resolve(__dirname, 'manifest.json'),
          to: path.resolve(__dirname, 'dist/manifest.json'),
        },
        {
          from: path.resolve(__dirname, 'popup.html'),
          to: path.resolve(__dirname, 'dist/popup.html'),
        },
      ]),
    ],
  };
new_contents: const path = require('path');
  const CopyWebpackPlugin = require('copy-webpack-plugin');
  
  module.exports = {
    context: __dirname,
    entry: path.resolve(__dirname, 'src/index.jsx'),
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: 'bundle.js',
    },
    devtool: 'source-map',
    resolve: {
      extensions: ['.js', '.jsx', '.json'],
    },
    module: {
      rules: [
        {
          test: /\.jsx?$/,
          loader: 'babel-loader',
        },
      ],
    },
    plugins: [
      new CopyWebpackPlugin([
        {
          from: path.resolve(__dirname, 'manifest.json'),
          to: path.resolve(__dirname, 'dist/manifest.json'),
        },
        {
          from: path.resolve(__dirname, 'popup.html'),
          to: path.resolve(__dirname, 'dist/popup.html'),
        },
      ]),
    ],
  };
  
subject: Add newline