title: I copied a navbar code from official bootstrap website v4.0, The code is same but the output is different why so?
body: <p>I copied a navbar code from official bootstrap website v4.0, The code is same but the output is different why so?<a href="https://i.stack.imgur.com/gGqwo.jpg" rel="nofollow noreferrer">Screenshot of both output attached below</a></p>