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A general description is here.
The default for ‘formatC(decimal.mark =)’ has been changed to be ‘getOption("OutDec")’; this makes it more consistent with ‘format()’ and suitable for use in print methods, e.g. those for classes ‘"density"’, ‘"ecdf"’, ‘"stepfun"’ and ‘"summary.lm"’.
‘getOption("OutDec")’ is now consulted by the print method for class ‘"kmeans"’, by ‘cut()’, ‘dendrogram()’, ‘plot.ts()’ and ‘quantile()’ when constructing labels and for the report from ‘legend(trace = TRUE)’.
(In part, wish of PR#15819.)
There is support for testing the ‘\dontrun’ and ‘\donttest’ parts of examples in packages.
‘tools::testInstalledPackage()’ accepts new arguments ‘commentDontrun = FALSE’ and ‘commentDonttest = FALSE’.
‘R CMD check’ gains ‘--run-dontrun’ and ‘--run-donttest’ options.
‘icuSetCollate()’ allows ‘locale = "default"’ to use the OS locale collation category, and ‘locale = "none"’ to use OS services rather than ICU for collation.