Add black autoformatting

[fepegar]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 84.93151% with 11 lines in your changes missing coverage. Please review.

Project coverage is 86.63%. Comparing base (8285c84) to head (bc19c82).
Report is 89 commits behind head on main.

Files with missing lines	Patch %	Lines
...rchio/transforms/preprocessing/spatial/resample.py	0.00%	3 Missing ⚠️
src/torchio/transforms/transform.py	83.33%	2 Missing ⚠️
src/torchio/data/image.py	80.00%	1 Missing ⚠️
src/torchio/data/sampler/label.py	0.00%	1 Missing ⚠️
src/torchio/datasets/episurg.py	50.00%	1 Missing ⚠️
src/torchio/datasets/slicer.py	0.00%	1 Missing ⚠️
...o/transforms/augmentation/spatial/random_affine.py	50.00%	1 Missing ⚠️
src/torchio/visualization.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1031   +/-   ##
=======================================
  Coverage   86.63%   86.63%           
=======================================
  Files          91       91           
  Lines        5800     5800           
=======================================
  Hits         5025     5025           
  Misses        775      775           

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