If you look at the imagine cheatsheets-2.png linked in the README.md:
https://github.com/matplotlib/cheatsheets/blob/master/cheatsheets-2.png

in the interpolations image grid, the "none" version actually is using some sort of interpolation. This makes it seem like "none" and None are different, but they should not be.

When I run the interpolations.py script locally
(https://github.com/matplotlib/cheatsheets/blob/master/scripts/interpolations.py) I get the following:

interpolations.pdf

which has the correct top row.

The image in the repo should be updated.