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In ‘rapply(x, ..)’, ‘x’ can also be “list-like” and of length >= 2^{31}.
‘trimws()’ gets new optional ‘whitespace’ argument, allowing larger definitions of “space”, e.g., including unicode spaces as wished in PR#17431.
‘unlist(x)’ now returns a correct ‘factor’ when ‘x’ is a nested list with factor leaves, fixing PR#12572 and PR#17419.