[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

doc/conf.py

@@ -342,5 +342,5 @@ texinfo_documents = [
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    'https://docs.python.org/': ('https://docs.python.org/3', None),
+    "https://docs.python.org/": ("https://docs.python.org/3", None),
 }