Fix Geocoder::Calculations.endpoint comment
Fix Geocoder::Calculations.endpoint comment

I just spent a few hours trying to get this function to work, then realized I had my parameters in the wrong order. I was following the order listed in the comment, rather than the actual method definition! *facepalm* Anyhow, this fixes the comment, for the next person to read it.
alexreisner/geocoder,tiramizoo/geocoder,donbobka/geocoder,TrangPham/geocoder,aceunreal/geocoder,ankane/geocoder,brian-ewell/geocoder,mdebo/geocoder,rdlugosz/geocoder,Devetzis/geocoder