old_contents: module.exports = {
      "env": {
          "browser": true,
          "commonjs": true,
          "es6": true
      },
      "extends": "eslint:recommended",
      "parserOptions": {
          "sourceType": "module"
      },
      "rules": {
          "indent": [
              "error",
              2
          ],
          "linebreak-style": [
              "error",
              "unix"
          ],
          "quotes": [
              "error",
              "single"
          ],
          "semi": [
              "error",
              "never"
          ]
      }
  };
  
new_contents: module.exports = {
      "env": {
          "browser": true,
          "commonjs": true,
          "es6": true,
          "node": true,
      },
      "extends": "eslint:recommended",
      "parserOptions": {
          "sourceType": "module"
      },
      "rules": {
          "indent": [
              "error",
              2
          ],
          "linebreak-style": [
              "error",
              "unix"
          ],
          "quotes": [
              "error",
              "single"
          ],
          "semi": [
              "error",
              "never"
          ]
      }
  };
  
subject: validate node syntax