Format code with black to fix CI build

[Copilot]

The CI build was failing because black would reformat code in the Jupyter notebook and Python source files that didn't comply with black 24.x formatting standards.

Changes

• Jupyter notebook: Reformatted long function call in examples/Swiss Parliament API.ipynb to comply with line length limits
• Python files: Fixed spacing and f-string formatting in swissparlpy/client.py and swissparlpy/visualization.py

All changes are formatting-only with no functional modifications.

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• ws.parlament.ch
  • Triggering command: /home/REDACTED/.local/bin/pytest pytest tests/ -v (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)