tweaks

git-svn-id: https://svn.r-project.org/R/trunk@63272 00db46b3-68df-0310-9c12-caf00c1e9a41
add check for excessive Depends:

git-svn-id: https://svn.r-project.org/R/trunk@63274 00db46b3-68df-0310-9c12-caf00c1e9a41