Correct description of getDistanceToGo() - this returns meters, not feet. Looking at the code it appears that it won't break anything to use the wrong units, so we'll just fx the documentation to make it clear its meters

src/AIModel/AIFlightPlan.cxx

@@ -339,10 +339,7 @@ void FGAIFlightPlan::eraseLastWaypoint()
     wpt_iterator++;
 }
 
-
-
-
-// gives distance in feet from a position to a waypoint
+// gives distance in meters from a position to a waypoint
 double FGAIFlightPlan::getDistanceToGo(double lat, double lon, FGAIWaypoint* wp) const{
   return SGGeodesy::distanceM(SGGeod::fromDeg(lon, lat), wp->getPos());
 }