* Add points are collinear in 3d algorithm to /maths
* Apply suggestions from code review in points_are_collinear_3d.py
Thanks to cclauss.
Co-authored-by: Christian Clauss <cclauss@me.com>
* Rename some variables to be more self-documenting.
* Update points_are_collinear_3d.py
Co-authored-by: Christian Clauss <cclauss@me.com>