From 15fff62d5d8f28b6b61d63341535c9aafc64c865 Mon Sep 17 00:00:00 2001
From: David Smith <39445562+smithdc1@users.noreply.github.com>
Date: Tue, 21 May 2024 13:15:29 +0100
Subject: [PATCH] Refs #29942 -- Fixed docs build on Python < 3.9 avoiding dict
 union operator.

The docs build process was failing on djangoproject.com since it uses Python 3.8 and the dict union operator was added in Python 3.9.
---
 docs/_ext/github_links.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/docs/_ext/github_links.py b/docs/_ext/github_links.py
index 32af97186d..08f4161a01 100644
--- a/docs/_ext/github_links.py
+++ b/docs/_ext/github_links.py
@@ -41,10 +41,10 @@ class CodeLocator(ast.NodeVisitor):
                 file = module_name_to_file_path(node.module)
                 file_contents = file.read_text(encoding="utf-8")
                 locator = CodeLocator.from_code(file_contents)
-                self.import_locations |= locator.import_locations
-                self.import_locations |= {
-                    n: node.module for n in locator.node_line_numbers if "." not in n
-                }
+                self.import_locations.update(locator.import_locations)
+                self.import_locations.update(
+                    {n: node.module for n in locator.node_line_numbers if "." not in n}
+                )
             else:
                 self.import_locations[alias.name] = ("." * node.level) + (
                     node.module or ""