[1.8.x] Sorted imports with isort; refs #23860.

Backport of 0ed7d15563 from master

tests/model_formsets/tests.py

@@ -8,16 +8,20 @@ from decimal import Decimal
 from django import forms
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
-from django.forms.models import (_get_foreign_key, inlineformset_factory,
-    modelformset_factory, BaseModelFormSet)
+from django.forms.models import (
+    BaseModelFormSet, _get_foreign_key, inlineformset_factory,
+    modelformset_factory,
+)
 from django.test import TestCase, skipUnlessDBFeature
 from django.utils import six
 
-from .models import (Author, BetterAuthor, Book, BookWithCustomPK,
-    BookWithOptionalAltEditor, AlternateBook, AuthorMeeting, CustomPrimaryKey,
-    Place, Owner, Location, OwnerProfile, Restaurant, Product, Price,
-    MexicanRestaurant, ClassyMexicanRestaurant, Repository, Revision,
-    Person, Membership, Team, Player, Poet, Poem, Post)
+from .models import (
+    AlternateBook, Author, AuthorMeeting, BetterAuthor, Book, BookWithCustomPK,
+    BookWithOptionalAltEditor, ClassyMexicanRestaurant, CustomPrimaryKey,
+    Location, Membership, MexicanRestaurant, Owner, OwnerProfile, Person,
+    Place, Player, Poem, Poet, Post, Price, Product, Repository, Restaurant,
+    Revision, Team,
+)
 
 
 class DeletionTests(TestCase):