Always return an array from `AssignmentParticipant#get_participants` even if it is an empty array
Always return an array from `AssignmentParticipant#get_participants`
even if it is an empty array

arpitashekhar/expertiza,ApertureScienceInnovators/expertiza,urmilparikh95/expertiza,expertiza/expertiza,redsock88/expertiza,redsock88/expertiza,expertiza/expertiza,michaelamoran/expertiza,mhhassan/expertiza,rmmaily/expertiza,KunmiaoYang/expertiza,urmilparikh95/expertiza,arpitashekhar/expertiza,rmmaily/expertiza,rmmaily/expertiza,urmilparikh95/expertiza,akshayjain114/expertiza,ApertureScienceInnovators/expertiza,ApertureScienceInnovators/expertiza,arpitashekhar/expertiza,joshio1/expertiza,akshayjain114/expertiza,kira0992/expertiza,redsock88/expertiza,joshio1/expertiza,mhhassan/expertiza,expertiza/expertiza,mhhassan/expertiza,michaelamoran/expertiza,rmmaily/expertiza,sid5788/expertiza,sid5788/expertiza,kira0992/expertiza,expertiza/expertiza,kira0992/expertiza,redsock88/expertiza,joshio1/expertiza,akshayjain114/expertiza,akshayjain114/expertiza,kira0992/expertiza,sid5788/expertiza,michaelamoran/expertiza,ApertureScienceInnovators/expertiza,KunmiaoYang/expertiza,KunmiaoYang/expertiza,KunmiaoYang/expertiza,arpitashekhar/expertiza,joshio1/expertiza,sid5788/expertiza,urmilparikh95/expertiza,michaelamoran/expertiza,mhhassan/expertiza