old_contents: const OFF = 0;
  
  module.exports = {
      "env": {
          "node": true
      },
      "parserOptions": {
          "ecmaVersion": 2017
      },
      "extends": "eslint:recommended",
      "rules": {
          "indent": [
              "error",
              "tab"
          ],
          "linebreak-style": [
              "error",
              "unix"
          ],
          "quotes": [
              "error",
              "single"
          ],
          "semi": [
              "error",
              "always"
          ],
          "no-console": OFF
      },
      "globals": {
          // Testing globals
          "describe": true,
          "it": true,
          "expect": true
      }
  };
new_contents: const OFF = 0;
  
  module.exports = {
      "env": {
          "node": true,
          "es6": true
      },
      "parserOptions": {
          "ecmaVersion": 2017
      },
      "extends": "eslint:recommended",
      "rules": {
          "indent": [
              "error",
              "tab"
          ],
          "linebreak-style": [
              "error",
              "unix"
          ],
          "quotes": [
              "error",
              "single"
          ],
          "semi": [
              "error",
              "always"
          ],
          "no-console": OFF
      },
      "globals": {
          // Testing globals
          "describe": true,
          "it": true,
          "expect": true
      }
  };
subject: Update eslint to support ES6 globals (like `Promise`)