pytest migration ruff PT compliance for unit.concatenate

[bjlittle]

🚀 Pull Request

Description

@pp-mo I've updated your changes so that they're ruff check --select PT (flake8-pytest-style) compliant.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.74%. Comparing base (fa86a4f) to head (a073aac).
Report is 8 commits behind head on FEATURE_pytest_conversion.

Additional details and impacted files

@@                    Coverage Diff                     @@
##           FEATURE_pytest_conversion    #5823   +/-   ##
==========================================================
  Coverage                      89.74%   89.74%           
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  Files                             92       92           
  Lines                          22940    22940           
  Branches                        5462     5462           
==========================================================
  Hits                           20588    20588           
  Misses                          1620     1620           
  Partials                         732      732           

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[pp-mo]

A wee bit of a downer, because when I spotted that I'd added the empty parentheses then I explicitly removed them !

But certainly can't argue with the standards + consistency message.