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Setting the ‘LC_ALL’ category in ‘Sys.setlocale()’ invalidates any cached locale-specific day/month names and the AM/PM indicator for ‘strptime()’ (as setting ‘LC_TIME’ has since R 3.1.0).
‘within(List, rm(x1, x2))’ works correctly again, also when ‘List[["x2"]]’ is ‘NULL’.
‘regexec(pattern, text, *)’ now also applies ‘as.character(.)’ to its first two arguments, as documented.