ported "refclass prototype" print()ing to R 3.1.1 patched

git-svn-id: https://svn.r-project.org/R/trunk@66688 00db46b3-68df-0310-9c12-caf00c1e9a41
port identical(<S4> ..) to  3.1.1 patched


git-svn-id: https://svn.r-project.org/R/trunk@66689 00db46b3-68df-0310-9c12-caf00c1e9a41