update

git-svn-id: https://svn.r-project.org/R/trunk@67190 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak hiding

git-svn-id: https://svn.r-project.org/R/trunk@67191 00db46b3-68df-0310-9c12-caf00c1e9a41
another tweak

git-svn-id: https://svn.r-project.org/R/trunk@67192 00db46b3-68df-0310-9c12-caf00c1e9a41