old_contents: module.exports = {
      'env': {
          'browser': true,
          'commonjs': true,
          'es6': true,
          'jasmine': true
      },
      'extends': [
          'eslint:recommended',
          'plugin:flowtype/recommended'
      ],
      'globals': {
          // The globals that (1) are accessed but not defined within many of our
          // files, (2) are certainly defined, and (3) we would like to use
          // without explicitly specifying them (using a comment) inside of our
          // files.
          '__filename': false
      },
      'parser': 'babel-eslint',
      'parserOptions': {
          'ecmaFeatures': {
              'experimentalObjectRestSpread': true
          },
          'sourceType': 'module'
      },
      'plugins': [
          'flowtype',
  
          // ESLint's rule no-duplicate-imports does not understand Flow's import
          // type. Fortunately, eslint-plugin-import understands Flow's import
          // type.
          'import'
      ],
      'rules': {
          'new-cap': 2,
          'no-console': 0,
          'semi': [ 'error', 'always' ],
  
          'no-cond-assign': 2,
          'no-constant-condition': 2,
          'no-control-regex': 2,
          'no-debugger': 2,
          'no-dupe-args': 2,
          'no-duplicate-case': 2,
          'no-empty': 2,
          'no-empty-character-class': 2,
          'no-ex-assign': 2,
          'no-extra-boolean-cast': 2,
          'no-extra-parens': [
              'error',
              'all',
              { 'nestedBinaryExpressions': false }
          ],
          'no-extra-semi': 2,
          'no-func-assign': 2,
          'no-inner-declarations': 2,
          'no-invalid-regexp': 2,
          'no-irregular-whitespace': 2,
          'no-negated-in-lhs': 2,
          'no-obj-calls': 2,
  
          'prefer-spread': 2,
          'require-yield': 2,
          'rest-spread-spacing': 2,
          'sort-imports': 0,
          'template-curly-spacing': 2,
          'yield-star-spacing': 2,
  
          'import/no-duplicates': 2
      }
  };
  
new_contents: module.exports = {
      'env': {
          'browser': true,
          'commonjs': true,
          'es6': true,
          'jasmine': true
      },
      'extends': [
          'eslint:recommended',
          'plugin:flowtype/recommended'
      ],
      'globals': {
          // The globals that (1) are accessed but not defined within many of our
          // files, (2) are certainly defined, and (3) we would like to use
          // without explicitly specifying them (using a comment) inside of our
          // files.
          '__filename': false
      },
      'parser': 'babel-eslint',
      'parserOptions': {
          'ecmaFeatures': {
              'experimentalObjectRestSpread': true
          },
          'sourceType': 'module'
      },
      'plugins': [
          'flowtype',
  
          // ESLint's rule no-duplicate-imports does not understand Flow's import
          // type. Fortunately, eslint-plugin-import understands Flow's import
          // type.
          'import'
      ],
      'rules': {
          'new-cap': 2,
          'no-console': 0,
          'semi': [ 'error', 'always' ],
  
          'no-cond-assign': 2,
          'no-constant-condition': 2,
          'no-control-regex': 2,
          'no-debugger': 2,
          'no-dupe-args': 2,
          'no-duplicate-case': 2,
          'no-empty': 2,
          'no-empty-character-class': 2,
          'no-ex-assign': 2,
          'no-extra-boolean-cast': 2,
          'no-extra-parens': [
              'error',
              'all',
              { 'nestedBinaryExpressions': false }
          ],
          'no-extra-semi': 2,
          'no-func-assign': 2,
          'no-inner-declarations': 2,
          'no-invalid-regexp': 2,
          'no-irregular-whitespace': 2,
          'no-negated-in-lhs': 2,
          'no-obj-calls': 2,
          'no-prototype-builtins': 0,
  
          'prefer-spread': 2,
          'require-yield': 2,
          'rest-spread-spacing': 2,
          'sort-imports': 0,
          'template-curly-spacing': 2,
          'yield-star-spacing': 2,
  
          'import/no-duplicates': 2
      }
  };
  
subject: Add no-prototype-builtins rule