Fix syntax error in an example in the ast documentation and sync docstrings (GH-18946)

(cherry picked from commit c00c86b90443dbf3534cc4786a0b42b58db6e8af)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
diff --git a/Lib/ast.py b/Lib/ast.py
index b45f1e4..157a833 100644
--- a/Lib/ast.py
+++ b/Lib/ast.py
@@ -408,11 +408,11 @@
        class RewriteName(NodeTransformer):
 
            def visit_Name(self, node):
-               return copy_location(Subscript(
+               return Subscript(
                    value=Name(id='data', ctx=Load()),
                    slice=Index(value=Str(s=node.id)),
                    ctx=node.ctx
-               ), node)
+               )
 
     Keep in mind that if the node you're operating on has child nodes you must
     either transform the child nodes yourself or call the :meth:`generic_visit`