Question about rendering in "plain" format
According to the documentation of the "plain" output, when the line is describing an edge:
n is the number of control points defining the B-spline forming the edge. This is followed by 2 ∗ n numbers giving the x and y coordinates of the control points in order from tail to head.
Will there always be at least one control point, or can there be none? If there are none, will the number
n be output as 0, or will it be skipped?