More often than not, when I see hand cut dovetails, I see that the marking at the end of the pins (tails?) is left in place. Like this:
Judging by the quality of the work that I see these on, I have to think that it's by design, not sloppiness. Why is it left there? It it some sort of traditional thing? I don't really like the way it looks. If I ever attempt these, I think I would not want the marks to be left there. Am I wrong in my thinking? Or, it there a technical reason why they're left there?