I can confirm this on 15.10. I ran "kdesudo software-properties-kde" from a terminal and it returned
No command 'software-properties-kde' found, did you mean:
Command 'software-properties-kde' from package 'software-properties-kde' (universe)
software-properties-kde: command not found
So I copied the command suggested into the clipboard, pasted it after typing "kdesudo", and it worked which is odd since the commands look identical.
I can confirm this on 15.10. I ran "kdesudo software- properties- kde" from a terminal and it returned
No command 'software- properties- kde' found, did you mean: properties- kde' from package 'software- properties- kde' (universe) properties- kde: command not found
Command 'software-
software-
So I copied the command suggested into the clipboard, pasted it after typing "kdesudo", and it worked which is odd since the commands look identical.