[Python-checkins] [3.12] gh-116535: Fix distracting "TypeError" in example code (gh-116538) (gh-116551)

[ericvsmith]

https://github.com/python/cpython/commit/0d5455fc7fa921b56d1f4cbdc89e1ba9036c2cd8
commit: 0d5455fc7fa921b56d1f4cbdc89e1ba9036c2cd8
branch: 3.12
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: ericvsmith <ericvsm...@users.noreply.github.com>
date: 2024-03-09T17:08:12-05:00
summary:

[3.12] gh-116535: Fix distracting "TypeError" in example code (gh-116538) 
(gh-116551)

gh-116535: Fix distracting "TypeError" in example code (gh-116538)
(cherry picked from commit db8f423f58e336eb6180a70d9886b443d7203c2c)

Co-authored-by: Declan <5962877+d...@users.noreply.github.com>

files:
M Doc/library/dataclasses.rst

diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index 020818a0812f0c..19272376e68c71 100644
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -717,7 +717,7 @@ Using dataclasses, *if* this code was valid::
   class D:
       x: list = []      # This code raises ValueError
       def add(self, element):
-          self.x += element
+          self.x.append(element)
 
 it would generate code similar to::
 
@@ -726,7 +726,7 @@ it would generate code similar to::
       def __init__(self, x=x):
           self.x = x
       def add(self, element):
-          self.x += element
+          self.x.append(element)
 
   assert D().x is D().x
 

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