@ -1677,7 +1677,8 @@ def write_point_list(stream: io.BufferedIOBase,
previous = [0, 0]
diff = []
for point in points:
d = [point[0] - previous[0], point[1] - previous[1]]
d = [point[0] - previous[0],
point[1] - previous[1]]
previous = point
diff.append(d)