PR Summary

This PR doesn't directly solve any real-world problems, but will make life easier in the future.

if self._base > 1:
    axis.set_major_formatter(LogFormatterSciNotation(self._base))
else:
    axis.set_major_formatter('{x:.3g}'),
                                       👆

The comma doesn't have any effect, but triggers a lint warning: Expression value is unused. (a, means the tuple (a,))

Additional information: This line was introduced in 65eff09.

⚠️ I'm not sure whether this kind of PR is welcomed. If not so, sorry for taking up time.

PR Checklist

Documentation and Tests

• [N/A] Has pytest style unit tests (and pytest passes)
• [N/A] Documentation is sphinx and numpydoc compliant (the docs should build without error).
• [N/A] New plotting related features are documented with examples.

Release Notes

• [N/A] New features are marked with a .. versionadded:: directive in the docstring and documented in doc/users/next_whats_new/
• [N/A] API changes are marked with a .. versionchanged:: directive in the docstring and documented in doc/api/next_api_changes/
• [N/A] Release notes conform with instructions in next_whats_new/README.rst or next_api_changes/README.rst