Update test_group_by.py

Remove extra whitespaces

Author: PrabhbirJ

tests/test_group_by.py

@@ -319,17 +319,13 @@ async def test_group_by_id_with_nested_filter(self):
         self.assertEqual(set(ret), {(book.id,) for book in self.books1})
 
     async def test_subquery_group_by_no_alias(self):
-        
         query = Author.annotate(
             book_name=Subquery(
                 Book.all().group_by("name").order_by("name").limit(1).values("name")
             )
         )
-        
         sql = query.sql()
-        
         self.assertIn('GROUP BY "name"', sql)
         self.assertNotIn('GROUP BY "name" "', sql)
-        
         result = await query.values("name", "book_name")
         self.assertIsInstance(result, list)