tweaks

git-svn-id: https://svn.r-project.org/R/trunk@66724 00db46b3-68df-0310-9c12-caf00c1e9a41
clean up

git-svn-id: https://svn.r-project.org/R/trunk@66726 00db46b3-68df-0310-9c12-caf00c1e9a41
update

git-svn-id: https://svn.r-project.org/R/trunk@66728 00db46b3-68df-0310-9c12-caf00c1e9a41
RShowDoc("NEWS") now uses pdf

git-svn-id: https://svn.r-project.org/R/trunk@66729 00db46b3-68df-0310-9c12-caf00c1e9a41
Fix for PR#16009 -- TRE problems with wchar character classes.

git-svn-id: https://svn.r-project.org/R/trunk@66731 00db46b3-68df-0310-9c12-caf00c1e9a41
Test for r66731

git-svn-id: https://svn.r-project.org/R/trunk@66732 00db46b3-68df-0310-9c12-caf00c1e9a41
print()ing of array/matrix with dim(.) = (.., 0); fixing PR#16012

git-svn-id: https://svn.r-project.org/R/trunk@66734 00db46b3-68df-0310-9c12-caf00c1e9a41