update

git-svn-id: https://svn.r-project.org/R/trunk@62776 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks, including for texinfo 5.x

git-svn-id: https://svn.r-project.org/R/trunk@62778 00db46b3-68df-0310-9c12-caf00c1e9a41
suppress warning in texinfo 4.8

git-svn-id: https://svn.r-project.org/R/trunk@62780 00db46b3-68df-0310-9c12-caf00c1e9a41
mention dev.new

git-svn-id: https://svn.r-project.org/R/trunk@62782 00db46b3-68df-0310-9c12-caf00c1e9a41