update code formatting to match newer black requirements

[slayoo]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (9a08f5a) 71.56% compared to head (03693db) 71.56%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
.../local/contract_tests/test_single_vs_multi_node.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #97   +/-   ##
=======================================
  Coverage   71.56%   71.56%           
=======================================
  Files          20       20           
  Lines         422      422           
=======================================
  Hits          302      302           
  Misses        120      120           

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