Evgeni Golov 8d0c193b25 allow before/after diff to be NoneType (#62582) ...

when creating or deleting an object (e.g. via an API), before/after can
be `None` (or at least represented as such by the used library). to
avoid modules havig to do

    diff={'before': before or '', 'after': after or ''}

let's just convert `None` to an empty string that can be diffed properly

2019-09-20 15:47:18 -04:00

..

__init__.py

Add empty-init code-smell script. (#18406)

2016-11-07 15:02:13 -08:00

test_callback.py

allow before/after diff to be NoneType (#62582)

2019-09-20 15:47:18 -04:00