function lintMsg(data) {
  return !data.autoInstall &&
    data.lint &&
    lintStyles.indexOf(data.lintConfig) !== -1
    ? 'npm run lint -- --fix (or for yarn: yarn run lint --fix)\n  '
    : ''
}
If the user will have to run lint --fix themselves, it returns a string
containing the instruction for this step.
@param {Object} data Data from questionnaire.