old_contents: module.exports = {
    extends: 'standard',
    rules: {
      'computed-property-spacing': ['error', 'never'],
      'array-bracket-spacing': ['error', 'never'],
      'func-name-matching': 'error',
      'consistent-return': 'error',
      'multiline-ternary': ['error', 'never'],
      'no-nested-ternary': 'error',
      'block-scoped-var': 'error',
      'no-invalid-this': 'error',
      'global-require': 'error',
      'no-unused-vars': [2, { 'vars': 'all', 'args': 'after-used' }],
      'no-lonely-if': 'error',
      'valid-jsdoc': 'error',
      'func-style': ['error', 'declaration'],
      'no-shadow': 'error',
      'max-len': [2, 80],
      'strict': ['error', 'global'],
      'no-new': 'off'
    },
    env: {
      browser: true,
      node: true,
      jest: true
    }
  }
  
new_contents: module.exports = {
    extends: 'standard',
    rules: {
      'computed-property-spacing': ['error', 'never'],
      'array-bracket-spacing': ['error', 'never'],
      'func-name-matching': 'error',
      'no-useless-return': 'error',
      'consistent-return': 'error',
      'multiline-ternary': ['error', 'never'],
      'no-nested-ternary': 'error',
      'block-scoped-var': 'error',
      'no-invalid-this': 'error',
      'global-require': 'error',
      'no-unused-vars': [2, { 'vars': 'all', 'args': 'after-used' }],
      'no-lonely-if': 'error',
      'valid-jsdoc': 'error',
      'func-style': ['error', 'declaration'],
      'no-shadow': 'error',
      'max-len': [2, 80],
      'strict': ['error', 'global'],
      'no-new': 'off'
    },
    env: {
      browser: true,
      node: true,
      jest: true
    }
  }
  
subject: Add no-useless-return rule