when non-space symbol is in "zero shift position" we should not update tag
when non-space symbol is in "zero shift position" we should not update tag

fadimko/blitz,poison/blitz,fadimko/blitz,fadimko/blitz,poison/blitz,YuriyNasretdinov/blitz,poison/blitz,YuriyNasretdinov/blitz,YuriyNasretdinov/blitz