Unova Routes 19-23 were added in B/W 2 and i forgot to prefix them when
we added the locations. Kalos Victory Road used to have a prefix but it
got dropped when i re-ripped X/Y locations. Kalos Pokemon League gets a
prefix too, since both Sinnoh and Alola also have Pokemon Leagues.
Add a test to ensure that we don't forget again in the future.