- Adjust for Mathics3 core 7.0.0 API, e.g., add explicit call to load builtins
- doctest refactored to use more routines common to mathics-core
- Support newer matplotlib, e.g. 3.9.1
- Update gallery examples
- Add background and tooltips to Graphics3D
- Expand information in /about:
- max digits in string
- system encoding
- time format