XCode -> Build Settings names with underscores

Question

I have had a Build Settings tab setting's names with underscores so far. And I know it supposed to be without underscores...

I've never complained a lot about that, just reviewed once "preferences" and google a bit but stopped trying to solve it because it has never been critical.

I've updated XCode to newer versions but this issue remains, and I'm just interested in the reason - what is wrong for my XCode configuration or something else.

My interest raised when I've noticed that XCode 5 DP2 has the same issue:

Answer 1

From Xcode's menu, while you have the build settings open:

Editor->Show Setting Titles