Divots should never go left of the Plane Line. If they do, you have a bent Plane Line. With short irons, your divots should go to the right; mid irons, slightly right to straight; long irons and woods, straight.
To understand proper divot direction, think about the Angle of Approach and how it points further and further to the right as the Ball moves back in your stance.
A bent Plane Line is generally due to the Right Shoulder not going Down enough (more Out than Down).
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