Hello, I believe there is a bug in tools::toTitleCase, because it converts NAs into the string "NA".
tools::toTitleCase(NA_character_)
The issue appears to be with the C function splitString since this also
returns "NA":
.Call('C_splitString', NA_character_, " -/\"()\n", PACKAGE = "tools")
Kind Regards,
Carl Ganz
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