[Polkas]

Checklist

• No clinical data accessed, referenced, or inferred — synthetic only
• PR has a right label — AI generated (not recommended), AI supported, no AI
• PR has a connected task linked
• New/changed functions have roxygen2 documentation
• Please make sure that language is correct
• New functionality has corresponding tests
• NEWS.md updated (if user-facing change)
• PR description should include some example code
• Branch is up to date with the target branch (no merge conflicts)
• Any new dependencies in DESCRIPTION are justified and discussed
• @examples updated in roxygen2 if function behaviour changed

Summary

Added step to install XQuartz on macOS for gdtools.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.58%. Comparing base (6d03dc3) to head (a9e41e1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #32   +/-   ##
=======================================
  Coverage   99.58%   99.58%           
=======================================
  Files           9        9           
  Lines         954      954           
=======================================
  Hits          950      950           
  Misses          4        4           

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