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A general description is here.
bxp() now computes the 'ylim' including the outliers only if 'outline = TRUE'. (Wish of PR#13196)
.packages() and .find.packages() no longer check the package info for installed packages with dumped metadata, since this was checked when the package was installed. .packages() only considers such packages to be validly installed (any others were installed in a long-obsolete version of R). Both changes speed up searches in libraries of thousands of packages().