Fix a variety of minor issues
CSS:
- use integer values for font-size in CSS
- use correct ordering of @import
- "invisible" isn't a tag - presume its a class
- "border-color" defines the complete border
python:
- use "not" instead of == "[]" for python
- prefer triple quoted docstrings
- prefer static functions where possible
- prefer modern style classes where possible
- remove semicolons;
global:
- remove duplicated words words
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