New submission from Novel :
Code to reproduce the problem:
```
import tkinter as tk
from tkinter.messagebox import showinfo
root = tk.Tk()
entry = tk.Entry(root)
entry.pack()
# root.update() # remove comment to fix the problem
showinfo('alert', 'this parrot is dead!&
Novel added the comment:
The offending file is here:
https://github.com/python/cpython/blob/master/Doc/tutorial/modules.rst
Read the developer's guide to learn how to submit your changes to python.
https://devguide.python.org/
--
nosy:
