old_contents: import React from 'react'
  import { IndexLink, Link } from 'react-router'
  import classes from './Header.scss'
  
  export const Header = () => (
    <div>
      <Link to='/list' activeClassName={classes.activeRoute}>
        List
      </Link>
    </div>
  )
  
  export default Header
  
new_contents: import React from 'react'
  import { IndexLink, Link } from 'react-router'
  import classes from './Header.scss'
  
  export const Header = () => (
    <div>
      <Link to='/list' activeClassName={classes.activeRoute}>
        Shops
      </Link>
    </div>
  )
  
  export default Header
  
subject: rename link header