Not sure about it constituting programming, but that (awareness of being able to manipulate the resource portion of a URL) does strike me as a good litmus test of general power-userdom.
Funnily enough, starting from Yosemite, Safari has started to hide that portion until you click into the address bar.
Funnily enough, starting from Yosemite, Safari has started to hide that portion until you click into the address bar.