[Rd] python-based examples within core-package help files

[Abby Spurdle]

I just noticed the following:
(Within the help file for methods::is).

supers <- extends("PythonInterface")
superRelations <- extends("PythonInterface", fullInfo = TRUE)

I was wondering:
Could we please *not* have python-based examples within core help files.

Furthermore, this example has no obvious relevance to mathematical or
statistical subject matter.

Maybe it could be rewritten to use the Matrix package.
Which would be 1000x better.
:)

I'm happy to add that to my todo list, if no one else volunteers...