Change "native migrations" to just "migrations"

These days just "migrations" is understood to be the built-in Django
migrations.

Author: bluetech

pytest_django/fixtures.py

@@ -111,7 +111,7 @@ def django_db_setup(
     setup_databases_args = {}
 
     if not django_db_use_migrations:
-        _disable_native_migrations()
+        _disable_migrations()
 
     if django_db_keepdb and not django_db_createdb:
         setup_databases_args["keepdb"] = True
@@ -186,7 +186,7 @@ class PytestDjangoTestCase(test_case_class):  # type: ignore[misc,valid-type]
     request.addfinalizer(test_case._post_teardown)
 
 
-def _disable_native_migrations() -> None:
+def _disable_migrations() -> None:
     from django.conf import settings
     from django.core.management.commands import migrate
 

tests/test_db_setup.py

@@ -449,8 +449,8 @@ def test_a():
         result.stdout.fnmatch_lines(["*PASSED*test_a*"])
 
 
-class TestNativeMigrations:
-    """ Tests for Django Migrations """
+class TestMigrations:
+    """Tests for Django Migrations."""
 
     def test_no_migrations(self, django_testdir) -> None:
         django_testdir.create_test_module(
@@ -464,12 +464,11 @@ def test_inner_migrations():
         """
         )
 
-        migration_file = django_testdir.project_root.join(
-            "tpkg/app/migrations/0001_initial.py"
-        )
-        assert migration_file.isfile()
-        migration_file.write(
-            'raise Exception("This should not get imported.")', ensure=True
+        django_testdir.create_test_module(
+            """
+            raise Exception("This should not get imported.")
+            """,
+            "migrations/0001_initial.py",
         )
 
         result = django_testdir.runpytest_subprocess(