It didn't work for me however the script types were set, especially alongside the modifiers added on top instead of separately for it was never shown otherwise. That's what threw me off. It made me think embedded scripts could be of any kind, opposed to just rename (or context menu command) ones. 
The JScript here resulted in the same empty output, even as a script. (I hadn't realized the modifiers and command had to be added before that script until much later, but with it giving the same empty result on its own, I thought none of it would be working, which led to this thread.)