Improve the toString result in Position.
Improve the toString result in Position.

Major-/apollo,LegendSky/apollo,apollo-rsps/apollo,apollo-rsps/apollo,LegendSky/apollo,apollo-rsps/apollo,garyttierney/apollo,garyttierney/apollo,SJ19/apollo,ryleykimmel/apollo,ryleykimmel/apollo,Major-/apollo,SJ19/apollo