A class that required >1 arguments to new() could not be subclassed.
Remove the offending call to new() and add a test that this now works.


git-svn-id: https://svn.r-project.org/R/trunk@66536 00db46b3-68df-0310-9c12-caf00c1e9a41
more notes on testing issues

git-svn-id: https://svn.r-project.org/R/trunk@66538 00db46b3-68df-0310-9c12-caf00c1e9a41
Tighten documentation requiring generator with no args to work


git-svn-id: https://svn.r-project.org/R/trunk@66540 00db46b3-68df-0310-9c12-caf00c1e9a41