Apply ruff/flake8-pytest-style rule PT012

[DimitriPapadopoulos]

PT012 pytest.raises() block should contain a single simple statement

TODO:

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/user-guide/*.rst
• Changes documented as a new file in changes/
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.58%. Comparing base (7c6160e) to head (71743ed).
⚠️ Report is 94 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3267      +/-   ##
==========================================
+ Coverage   59.56%   59.58%   +0.01%     
==========================================
  Files          78       78              
  Lines        8694     8694              
==========================================
+ Hits         5179     5180       +1     
+ Misses       3515     3514       -1     

see 1 file with indirect coverage changes

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