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A general description is here.
‘assignInNamepspace()’ has further restrictions on use apart from at top-level, as its help page has warned. Expect it to be disabled from programmatic use in the future.
Package start-up code attempting to change locked bindings in standard
packages is now a error, not a warning.
‘R CMD check’ now gives a warning rather than a note if it finds inefficiently compressed datasets. With bzip2 and xz compression having been available since 2.10.0, there is no excuse for not using them.
It now checks line-endings of makefiles and C/C++/Fortran sources in subdirectories of ‘src’ as well as in ‘src’ itself.
‘stack()’ now gives an error if no vector column is selected, rather than returning a 1-column data frame (contrary to its documentation).
The ‘Save as’ menu item on the script editor appends ‘.R’ to a file name without an extension.