Dataclasses: Fix example on 30.6.8, add method should receive a list rather than an integer. (GH-8038) (GH-8237)
Change example function to append rather than add lists.
(cherry picked from commit da5e9476bbfbe61f7661fd22caba1b675e5b4397)
Co-authored-by: Tom Faulkner <tomfaulkner@gmail.com>
diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index 9835c48..e9af20a 100644
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -533,7 +533,7 @@
class C:
x = []
def add(self, element):
- self.x += element
+ self.x.append(element)
o1 = C()
o2 = C()