Ruff formatted available radial space for #4383

[jmorris-uk]

Description

Minor formatting change to remove Pylance warning.

[timothy-nunn]

I want to clarify to anyone reviewing what was going on here. Before this change the calculation for available radial space was essentially:

data.build.available_radial_space = (
    data.stellarator.r_coil_minor * data.stellarator.f_coil_shape
    - data.physics.rminor
)

This bit of code was not doing anything and it was not changing the available_radial_space.

+data.stellarator_config.stella_config_derivative_min_lcfs_coils_dist * (
    data.physics.rminor
    - data.stellarator.f_st_rmajor * data.stellarator_config.stella_config_rminor_ref
)

It would be good for someone with stellarator knowledge to confirm that this was a mistake @jjwalkowiak @grmtrkngtn

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.85%. Comparing base (e9d8681) to head (e219e5d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4423      +/-   ##
==========================================
- Coverage   48.85%   48.85%   -0.01%     
==========================================
  Files         151      151              
  Lines       29390    29389       -1     
==========================================
- Hits        14359    14358       -1     
  Misses      15031    15031              

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[clmould]

I'm happy with this change from a code perspective, but will wait for stellarator people to look and approve before merging, esp with the regression failures :)

[jjwalkowiak]

These two parts are responsible for two different scaling of available space. Both are necessary. I think in the version I use both of them work. I can check again tomorrow.