Fixed clippy lints

[stefan-k]

No description provided.

[codecov-commenter]

Codecov Report

Base: 93.36% // Head: 93.39% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (ed969a9) compared to base (c305edd).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
+ Coverage   93.36%   93.39%   +0.02%     
==========================================
  Files         119      119              
  Lines       18986    18975      -11     
==========================================
- Hits        17726    17721       -5     
+ Misses       1260     1254       -6     

Impacted Files	Coverage Δ
argmin/src/solver/particleswarm/mod.rs	97.54% <ø> (-0.02%)	⬇️
argmin/src/core/checkpointing/mod.rs	64.70% <100.00%> (-1.50%)	⬇️
argmin/src/core/termination.rs	80.00% <100.00%> (+3.80%)	⬆️
argmin/src/solver/simulatedannealing/mod.rs	86.19% <100.00%> (+0.53%)	⬆️

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