update PythonObjects

Author: rambasnet

notebooks/PythonObjects.ipynb

@@ -1308,7 +1308,7 @@
     "\n",
     "- also called anti-pattern because there is only one instance of the class\n",
     "- use `__new__()` method to create a new instance of the class\n",
-    "_ `__new__()` is a class method that is called before the `__init__()` instance method\n",
+    "- `__new__()` is a class method that is called before the `__init__()` instance method\n",
     "- use `cls` parameter to check if the instance is already created\n",
     "- return the instance if it's already created\n",
     "- otherwise, create a new instance and return it\n",