Adjust docstrings for RST render

[eirikurj]

Purpose

This PR fixes broken docstrings in the API documentation, e.g., here .

Expected time until merged

1 day

Type of change

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (non-backwards-compatible fix or feature)
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no API changes)
• [x] Documentation update
• [ ] Maintenance update
• [ ] Other (please describe)

Testing

Checklist

• [ ] I have run flake8 and black to make sure the Python code adheres to PEP-8 and is consistently formatted
• [ ] I have formatted the Fortran code with fprettify or C/C++ code with clang-format as applicable
• [ ] I have run unit and regression tests which pass locally with my changes
• [ ] I have added new tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation

[codecov[bot]]

Codecov Report

Merging #59 (389482c) into main (161cc2b) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #59   +/-   ##
=======================================
  Coverage   52.53%   52.53%           
=======================================
  Files           5        5           
  Lines        1616     1616           
=======================================
  Hits          849      849           
  Misses        767      767           

Impacted Files	Coverage Δ
pyspline/utils.py	48.36% <ø> (ø)

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