[docs] Fix docstrings

[felixdittrich92]

This PR:

• Remove docstring underlines

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.23%. Comparing base (9c8abc2) to head (68bffbe).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #49   +/-   ##
=======================================
  Coverage   98.23%   98.23%           
=======================================
  Files          65       66    +1     
  Lines        2038     2039    +1     
=======================================
+ Hits         2002     2003    +1     
  Misses         36       36           

Flag	Coverage Δ
unittests	98.23% <100.00%> (+<0.01%)	⬆️

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