Triaged
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https://code.djangoproject.com/ticket/27304 - Django 1.10 onwards broke previous behaviour for models.DateTimeField() in Admin (invalid)
https://code.djangoproject.com/ticket/27258 - Raise an exception if RequestContext is used with template.backends.django.Template.render() (accepted)
https://code.djangoproject.com/ticket/27295 - Add a system check to prohibit models that start with an underscore (accepted)
https://code.djangoproject.com/ticket/27308 - BytesWarning exception raised when running with python 3 -bb option (accepted)
https://code.djangoproject.com/ticket/27313 - Allow overriding the admin's popup response template on an app or model basis (accepted)
https://code.djangoproject.com/ticket/27312 - Checking raw argument to prevent signals from executing during fixture loading isn't DRY (needsinfo)
https://code.djangoproject.com/ticket/27319 - Circular ForeignKeys between two unmanaged models produce incomplete migrations (accepted)
https://code.djangoproject.com/ticket/27315 - IntegrityError: insert or update on table violates foreign key constraint on Django 1.10 (needsinfo)
https://code.djangoproject.com/ticket/27317 - Make Form subclasses combine Form.Media from all parents (accepted)
https://code.djangoproject.com/ticket/27326 - Overriding queryset deletion from ModelAdmin (duplicate)
Authored
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https://github.com/django/django/pull/7360 - Fixed #27148 -- Fixed ModelMultipleChoiceField crash with invalid UUID.
https://github.com/django/django/pull/7361 - Fixed #27327 -- Simplified time zone handling by requiring pytz.
Reviewed/committed
------------------
https://github.com/django/djangoproject.com/pull/709 - Fixed #551 -- Prevented a hero from being created on a failed donation.
https://github.com/django/django/pull/7337 - Fixed #27309 -- Added CallableBool.__hash__().
https://github.com/django/django/pull/7338 - Refs #27118 -- Reallowed using pk in QuerySet.get/update_or_create().
https://github.com/django/django/pull/7319 - Fixed #27193 -- Preserved ordering in select_for_update subqueries.
https://github.com/django/django/pull/7330 - Fixed #27218 -- Returned LogEntry instances from ModelAdmin.log_*() methods.
https://github.com/django/django/pull/7332 - Fixed #27262 -- Moved URL checks to resolver and pattern classes.
https://github.com/django/django/pull/7325 - Fixed #27301 -- Prevented exceptions that fail unpickling from crashing the parallel test runner.
https://github.com/django/django/pull/7335 - Fixed #26327 -- Added JsonAgg to contrib.postgres.
https://github.com/django/django/pull/7252 - Fixed #24941 -- Added ModelAdmin.get_exclude().
Reviews of core dev work
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https://github.com/django/django/pull/7336 - Fixed #27279 -- Fixed a migration performance regression related to RenameModel operations.