Add an attribution to the Green Tree Snakes in the AST docs (GH-24727)
diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
index aaedfbe..b5e1be8 100644
--- a/Doc/library/ast.rst
+++ b/Doc/library/ast.rst
@@ -140,6 +140,11 @@
In the meantime, instantiating them will return an instance of
a different class.
+.. note::
+ The descriptions of the specific node classes displayed here
+ were initially adapted from the fantastic `Green Tree
+ Snakes <https://greentreesnakes.readthedocs.io/en/latest/>`__ project and
+ all its contributors.
Literals
^^^^^^^^
