Add direct coverage for unquoter with plus=True

[bdraco]

followup to #1493

While the tests would already fail if this didn't work, its good to have some direct coverage as well.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.92%. Comparing base (3bf614a) to head (2499246).
Report is 1 commits behind head on master.

❌ Your project status has failed because the head coverage (98.07%) is below the target coverage (100.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1497   +/-   ##
=======================================
  Coverage   98.92%   98.92%           
=======================================
  Files          32       32           
  Lines        6070     6074    +4     
  Branches      365      365           
=======================================
+ Hits         6005     6009    +4     
  Misses         62       62           
  Partials        3        3           

Flag	Coverage Δ
CI-GHA	98.92% <100.00%> (+<0.01%)	⬆️
MyPy	98.07% <100.00%> (+<0.01%)	⬆️
OS-Linux	98.78% <100.00%> (+<0.01%)	⬆️
OS-Windows	98.82% <100.00%> (+<0.01%)	⬆️
OS-macOS	98.56% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	98.54% <100.00%> (+<0.01%)	⬆️
Py-3.10.16	98.74% <100.00%> (+<0.01%)	⬆️
Py-3.11.11	98.74% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	98.54% <100.00%> (+<0.01%)	⬆️
Py-3.12.9	98.74% <100.00%> (+<0.01%)	⬆️
Py-3.13.2	98.74% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	98.50% <100.00%> (+<0.01%)	⬆️
Py-3.9.21	98.70% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	98.69% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.19	98.71% <100.00%> (+<0.01%)	⬆️
VM-macos-latest	98.56% <100.00%> (+<0.01%)	⬆️
VM-ubuntu-latest	98.78% <100.00%> (+<0.01%)	⬆️
VM-windows-latest	98.82% <100.00%> (+<0.01%)	⬆️
pytest	98.78% <100.00%> (+<0.01%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #1497 will not alter performance

_{Comparing unquote_plus_tests (2499246) with master (3bf614a)}

Summary

✅ 101 untouched benchmarks