reinforce comment about Enhances

git-svn-id: https://svn.r-project.org/R/trunk@66752 00db46b3-68df-0310-9c12-caf00c1e9a41
correct section hierarchy

git-svn-id: https://svn.r-project.org/R/trunk@66754 00db46b3-68df-0310-9c12-caf00c1e9a41
align with R-patched

git-svn-id: https://svn.r-project.org/R/trunk@66756 00db46b3-68df-0310-9c12-caf00c1e9a41
apply() and names(dimnames(.)): another case related to r66721

git-svn-id: https://svn.r-project.org/R/trunk@66761 00db46b3-68df-0310-9c12-caf00c1e9a41
more exclusions

git-svn-id: https://svn.r-project.org/R/trunk@66763 00db46b3-68df-0310-9c12-caf00c1e9a41