See: http://hg.python.org/cpython/file/d31e83497c5a/Doc/library/sqlite3.rst#l708

PEP 246 is headed by: 
"""
Rejection Notice

    I'm rejecting this PEP.  Something much better is about to happen;
    it's too early to say exactly what, but it's not going to resemble
    the proposal in this PEP too closely so it's better to start a new
    PEP.  GvR.
"""

I don't know what the "something much better" was/is, so I have no idea how that line in the docs should be replaced, but I don't think the PEP 246 reference is valid.

Thanks,

Zach