Apply fixes from StyleCI

[belamov]

This pull request applies code style fixes from an analysis carried out by StyleCI.

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For more information, click here.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.54%. Comparing base (2f9c856) to head (a85a2a3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #39   +/-   ##
=========================================
  Coverage     99.54%   99.54%           
  Complexity       86       86           
=========================================
  Files            21       21           
  Lines           220      220           
=========================================
  Hits            219      219           
  Misses            1        1           

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