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Support for ‘encoding = "MacRoman"’ has been removed from the ‘pdf()’ and ‘postscript()’ devices - this was a legacy encoding supporting classic macOS up to 2001 (with various revisions), and no longer has universal ‘libiconv’ support.
Correct ‘as.function(<invalid list>, .)’'s error message.
The legacy ‘encoding = "MacRoman"’ is deprecated in ‘pdf()’, ‘postscript()’.