Model Meta is overwriten by abstract parent class

Hi, it seems to be an actual django bug, the example at the address  https://docs.djangoproject.com/en/1.10/topics/db/models/#meta-inheritance  does not work correctly,        from django.db import models        class BaseCategory(models.Model):          title = models.CharField(max_length=100)            class Meta:              abstract = True              ordering = ['title']        class Category(BaseCategory):            name = models.CharField(max_length=100)            class Meta(BaseCategory.Meta):              ordering = ['name']              db_table = 'samble'    Category.Meta.ordering is equal to ['title'], Category.Meta.db_table is  undefined and Category.Meta.abstract is correctly set to false, in fact  Category.Meta is of type BaseCategory.Meta.    A stranger behavior is when `abstract = True` is added to the subclass :        class Category(BaseCategory):            name = models.CharField(max_length=100)            class Meta(BaseCategory.Meta):              abstract = True              ordering = ['name']              db_table = 'sample'    Now the behavior is correct (if abstract was not set) :  Category.Meta.db_table = 'sample', Category.Meta.ordering = ['name'] but  Category.Meta.abstract = False, Category.Meta is of type Category.Meta    So additionally it is impossible to create an abstract class inheriting  an abstract class.    Tested with django 1.8, 1.9, 1.10, 1.10.1 and python 2.7, 3.4  

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