Fix test #57

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3 errors and 4 warnings

R CMD check found WARNINGs

Process completed with exit code 1.

No such keg: /opt/homebrew/Cellar/r

Codoc mismatches from Rd file 'ci.coords.Rd':

Objects in \usage without \alias in Rd file 'plot.ci.Rd':

pkg-config 0.29.2_3 is already installed and up-to-date. To reinstall 0.29.2_3, run: brew reinstall pkg-config

HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK is set: not checking for outdated dependents or dependents with broken linkage!