title: angular 4 routing params error
body: <p>My angular 4 application implements routing, one of my path is <code>detail/:code</code>.
  But my code isn't a simply number, is a partial string path like this <code>/user/4</code>
  It works well when I navigate appending this code to my principal endpoint but when I land into this detail page if I look into my url bar I found this path </p>
  
  <blockquote>
    <p><a href="http://localhost:4200/dashboard/user-detail/%2Fusers%2F2" rel="nofollow noreferrer">http://localhost:4200/dashboard/user-detail/%2Fusers%2F2</a></p>
  </blockquote>
  
  <p>It use escape %2 for my '/',
  I can't change my code into a number, is it possible to figure out the correct url?</p>