Add some documentation precisions for astar
Add some documentation precisions for astar

mcandre/factor,erg/factor,erg/factor,cataska/factor,cataska/factor,ceninan/factor,mcandre/factor,erg/factor,mcandre/factor,erg/factor,cataska/factor,kingcons/factor,kingcons/factor,ceninan/factor,erg/factor,ceninan/factor,ceninan/factor,mcandre/factor,mcandre/factor,kingcons/factor,kingcons/factor,erg/factor,cataska/factor,mcandre/factor,mcandre/factor,erg/factor