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A general description is here.
plot() methods for "stepfun" and hence "ecdf" no longer plot points by default for n >= 10000.
tabulate now allows NAs to pass through (and be ignored).
parse_Rd() now always converts its input to UTF-8. The Rd2* rendering functions have a new parameter, 'outputEncoding', which controls how their output is encoded: by default in the local encoding.