[issue19719] add importlib.abc.SpecLoader and SpecFinder

[Roundup Robot]

Roundup Robot added the comment:

New changeset 21786a7f8036 by Brett Cannon in branch 'default':
Issue #19719: Update various finder and loader ABCs such that their
http://hg.python.org/cpython/rev/21786a7f8036

----------
nosy: +python-dev

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19719>
_______________________________________