Fix poor variable name (flake8 warning)

            return

        directory_created = {}

        for app_label, migrations in changes.items():

        for app_label, app_migrations in changes.items():

            if self.verbosity >= 1:

                self.stdout.write(self.style.MIGRATE_HEADING("Migrations for '%s':" % app_label) + "\n")

            for migration in migrations:

            for migration in app_migrations:

                # Describe the migration

                writer = MigrationWriter(migration)

                if self.verbosity >= 1: