[kmoser]

Unless prompted to do so, why would it? From the article: "Every shortcut you merge into your codebase is a signal about how things are done here."

[soperj]

Not duplicating code is literally best practice. Why would it deviate from that?

[webjunkie]

This is far from a universal best practice and heavily depends on what code it is and for what reason you are duplicating it potentially.