Clarify.

git-svn-id: https://svn.r-project.org/R/trunk@66691 00db46b3-68df-0310-9c12-caf00c1e9a41
S3 dispatch cleanups from Tomas Kalibera.


git-svn-id: https://svn.r-project.org/R/trunk@66693 00db46b3-68df-0310-9c12-caf00c1e9a41
Optimizations to passing meta and other variables in S2 dispatch fom
Tomas Kalibera. Extra arguments to applyClosure are now passed as a
pairlist rather than as an environment.


git-svn-id: https://svn.r-project.org/R/trunk@66694 00db46b3-68df-0310-9c12-caf00c1e9a41