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A general description is here.
‘R CMD check’ now checks if a package can be loaded by
‘library(pkgname, lib.loc = "somewhere")’ without being on the library
search path (unless it is already installed in ‘.Library’, when it
always will be).
‘R CMD build’ now omits Eclipse's ‘.metadata’ directories, and ‘R CMD check’ warns if it finds them.
The previously deprecated uses of ‘array()’ with a 0-length ‘dim’ argument and ‘tapply()’ with a 0-length ‘INDEX’ list are now errors.
Place holder.
When ‘R CMD build’ is run in an encoding other than the one specified in the package's ‘DESCRIPTION’ file it tries harder to expand the ‘authors@R’ field in the specified encoding. (PR14958.)
If ‘R CMD INSTALL’ is required to expand the ‘authors@R’ field of the ‘DESCRIPTION’ file, it tries harder to do so in the encoding specified for the package (rather than using ASCII escapes).
‘R CMD check’ now checks if a package can be loaded by ‘library(pkgname, lib.loc = "somewhere")’ without being on the library search path (unless it is already installed in ‘.Library’, when it always will be).