Log Message:
py-pylint: updated to 1.9.2

Pylint 1.9.2:
* Fix `KeyError` raised when using docparams and NotImplementedError is documented.

* Don't include excepthandlers that don't have a name when looking for \ 
exception-escape

* Rewrite the comprehension-escape and exception-escape to work only on the \ 
corresponding nodes

These two checks were implemented in terms of visit_namne, that is, for every \ 
name in the tree,
we looked to see if that name leaked. This was resulting in a couple of false \ 
positives
and also in a performance issue, since we were calling nodes_of_class() and \ 
scope() for each
name node. Instead, this approach uses the visit methods for exception and \ 
comprehension nodes
and looks to see from there if the current scope uses leaked names.
This is not the ideal situation as well, ideal would be to have access to the \ 
definition
frame of each name, but that requires some extra engineering effort in astroid \ 
to get it right.

* builtins is allowed to redefine builtins.