Linting adjustments

[clmould]

Description

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.09353% with 186 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.99%. Comparing base (0548fed) to head (12dd4f2).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
process/io/plot_proc.py	0.00%	40 Missing ⚠️
process/io/mfile2dict.py	62.35%	32 Missing ⚠️
process/pfcoil.py	0.00%	20 Missing ⚠️
process/blanket_library.py	6.25%	15 Missing ⚠️
process/stellarator.py	0.00%	15 Missing ⚠️
process/io/plot_scans.py	0.00%	9 Missing ⚠️
process/costs_2015.py	28.57%	5 Missing ⚠️
process/geometry/shield_geometry.py	0.00%	4 Missing ⚠️
process/io/plot_stress_tf.py	0.00%	4 Missing ⚠️
process/physics.py	0.00%	4 Missing ⚠️
... and 25 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4016      +/-   ##
==========================================
- Coverage   45.89%   43.99%   -1.91%     
==========================================
  Files         123      123              
  Lines       29066    31311    +2245     
==========================================
+ Hits        13340    13775     +435     
- Misses      15726    17536    +1810     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.