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A general description is here.
New functions ‘bitwNot()’, ‘bitwAnd()’, ‘bitwOr()’ and ‘bitwXor()’, using the internal interfaces previously used for classes ‘"octmode"’ and ‘"hexmode"’.
Also ‘bitwShiftL()’ and ‘bitwShiftR()’ for shifting bits in elements of integer vectors.
New option ‘"deparse.cutof"’ to control the deparsing of language objects such as calls and formulae when printing. (Suggested by a comment of Sarah Goslee.)