This blog is updated daily.
A general description is here.
The ‘--no-vignettes’ argument of ‘R CMD build’ has been renamed to the more accurate ‘--no-build-vignettes’: its action has always been to (re)build vignettes and never omitted them.
‘R CMD check’ accepts ‘--no-build-vignettes’ as a preferred synonym for ‘--no-rebuild-vignettes’.
On Windows, ‘basename()’, ‘dirname()’ and ‘file.choose()’ have more support for long non-ASCII file names with 260 or more bytes when expressed in UTF-8.