fix merge artifact

django-stubs/contrib/auth/base_user.pyi

@@ -4,7 +4,7 @@ from django.db.models.base import Model
 
 from django.db import models
 
-_T = TypeVar('_T', bound=Model)
+_T = TypeVar("_T", bound=Model)
 
 class BaseUserManager(models.Manager[_T]):
     @classmethod

django-stubs/contrib/auth/models.pyi

@@ -1,11 +1,11 @@
-from typing import Any, List, Optional, Set, Tuple, Type, Union, TypeVar
+from typing import Any, Collection, Optional, Set, Tuple, Type, TypeVar
 
 from django.contrib.auth.base_user import AbstractBaseUser as AbstractBaseUser, BaseUserManager as BaseUserManager
+from django.contrib.auth.validators import UnicodeUsernameValidator
 from django.contrib.contenttypes.models import ContentType
 from django.db.models.base import Model
 from django.db.models.manager import EmptyManager
 
-from django.contrib.auth.validators import UnicodeUsernameValidator
 from django.db import models
 
 def update_last_login(sender: Type[AbstractBaseUser], user: AbstractBaseUser, **kwargs: Any) -> None: ...
@@ -28,7 +28,7 @@ class Group(models.Model):
     permissions: models.ManyToManyField = models.ManyToManyField(Permission)
     def natural_key(self): ...
 
-_T = TypeVar('_T', bound=Model)
+_T = TypeVar("_T", bound=Model)
 
 class UserManager(BaseUserManager[_T]):
     def create_user(