The Linter is blocking otherwise reasonable pull requests

[grimley517]

There are currently a number of PRS in this repository which are failing to build as the linter is blocking them.

[faif]

Agreed. Can somebody spend some time on fixing those?

[grimley517]

I can't assign myself to this, but PR #417 addresses the issue.

[grimley517]

This issue is addressed.

Although some doctests still fail.