Fix choices working incorrectly when nargs is +, * or number

[mauvilsa]

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• Did you write unit tests such that there is 100% coverage on related code? (required for bug fixes and new features)
• Did you verify that new and existing tests pass locally?
• Did you make sure that all changes preserve backward compatibility?
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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (915b047) 100.00% compared to head (f49f7f3) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #410   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           21        21           
  Lines         5888      5892    +4     
=========================================
+ Hits          5888      5892    +4     

Flag	Coverage Δ
py3.10	88.18% <100.00%> (+<0.01%)	⬆️
py3.10_all	98.71% <100.00%> (+<0.01%)	⬆️
py3.10_pydantic1	48.28% <16.66%> (-0.04%)	⬇️
py3.10_pydantic2	48.01% <16.66%> (-0.04%)	⬇️
py3.10_types	98.71% <100.00%> (+<0.01%)	⬆️
py3.11	88.17% <100.00%> (+<0.01%)	⬆️
py3.11_all	98.71% <100.00%> (+<0.01%)	⬆️
py3.11_types	98.71% <100.00%> (+<0.01%)	⬆️
py3.7	88.76% <100.00%> (+<0.01%)	⬆️
py3.7_all	99.48% <100.00%> (+<0.01%)	⬆️
py3.7_types	99.46% <100.00%> (+<0.01%)	⬆️
py3.8	88.91% <100.00%> (+<0.01%)	⬆️
py3.8_all	99.50% <100.00%> (+<0.01%)	⬆️
py3.8_types	99.49% <100.00%> (+<0.01%)	⬆️
py3.9	88.76% <100.00%> (+<0.01%)	⬆️
py3.9_all	99.37% <100.00%> (+<0.01%)	⬆️
py3.9_types	99.37% <100.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
jsonargparse/_core.py	100.00% <100.00%> (ø)

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