Format Python code with psf/black push

[github-actions[bot]]

There appear to be some python formatting errors in 67877b10aa76864f9490e49451b33ced1a4ee7a9. This pull request uses the psf/black formatter to fix these issues.

[codecov[bot]]

Codecov Report

Merging #436 (b9cf0c4) into enhance_multitaper_engine (b9cf0c4) will not change coverage. The diff coverage is n/a.

:exclamation: Current head b9cf0c4 differs from pull request most recent head 76a2000. Consider uploading reports for the commit 76a2000 to get more accurate results

@@                    Coverage Diff                     @@
##           enhance_multitaper_engine     #436   +/-   ##
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  Coverage                      54.25%   54.25%           
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  Files                            144      144           
  Lines                          21919    21919           
==========================================================
  Hits                           11892    11892           
  Misses                         10027    10027           

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