def __sub__(self, other):
"""
- If other is a point, substract a point from another and returns the
- resulting vector. If other is a vector, translate the point by the
- opposite vector and returns the resulting point.
+ If other is a point, substract it from self and return the resulting
+ vector. If other is a vector, translate the point by the opposite vector
+ and returns the resulting point.
"""
coordinates = []
if isinstance(other, Point):