https://github.com/sdispater/pendulum/blob/94d28b0d3cb524ae02361bd1ed7ea03e2e655e4e/pendulum/formatting/formatter.py#L36 Should be `A-Z` not `A-z`. The latter accepts a few characters such a `[`.
https://github.com/sdispater/pendulum/blob/94d28b0d3cb524ae02361bd1ed7ea03e2e655e4e/pendulum/formatting/formatter.py#L36
Should be
A-ZnotA-z. The latter accepts a few characters such a[.