Apply pre-commit hooks on all files.

tests/test_project/app_drop_column/migrations/0001_initial.py

@@ -7,7 +7,6 @@ from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
-
     initial = True
 
     dependencies = []

tests/test_project/app_drop_column/migrations/0002_remove_a_field_b.py

@@ -7,7 +7,6 @@ from django.db import migrations
 
 
 class Migration(migrations.Migration):
-
     dependencies = [("app_drop_column", "0001_initial")]
 
     operations = [migrations.RemoveField(model_name="a", name="field_b")]