Polishing: mAP50 {value_pct} at epoch {epoch} — within five points of a perfect score.
Epoch {epoch}: mAP50 {value_pct}, a change of {delta_pct} points since the previous reading. It is five points or less from a perfect score.
Final touches: mAP50 {value_pct} at epoch {epoch}, at or within 1% of the best this run has reached.
