Quote
We have inspectors that feel that the wall space for a free standing range should have a 120v outlet installed in case the homeowner elects to install a gas range even when he specs on the job call out an electric range

How nice. [Linked Image]
Do they also have you install a 50 amp 240V range circuit if there is a gas stove going in? What if they ever want an electric range?
Simple answer NEC does not require this and if they are under the NEC they have no authority to make you do it. What is even worse than them requiring it is the fact that I am sure some guys do it either not knowing better or just to "keep the inspector happy".