Fixed bug with predicate toString; added note on usage
Fixed bug with predicate toString; added note on usage

saav/HubTurbo,HyungJon/HubTurbo,ianngiaw/HubTurbo,Sumei1009/HubTurbo,Honoo/HubTurbo,ianngiaw/HubTurbo,HyungJon/HubTurbo,gaieepo/HubTurbo,Honoo/HubTurbo,saav/HubTurbo,gaieepo/HubTurbo,Sumei1009/HubTurbo