Padding inconsistency in containers example

[bluenote10]

I've noticed a minor padding/spacing inconsistency in the containers example:

The implementation would suggest that the "Mid" container should probably have the same right-padding inside "Low" as the other containers, especially since it is the case in the recursive versions of the function.

[ecton]

Thank you for reporting this! I'm almost 100% certain I know what I did to cause this, as I thought to myself, "this will probably break the container shadow calculation," but I somehow didn't notice this when testing the change!