Sort imports with isort

Keep imports alphabetically sorted and their order homogeneous across
Python source files.

The isort project has more feature and is more active than the
flake8-import-order plugin.

Most issues caught were simply import ordering from the same module.
Where imports were purposefully placed out of order, tag with
isort:skip.

1 files changed, 1 insertions, 3 deletions

diff --git a/sphinx/domains/changeset.py b/sphinx/domains/changeset.py
index a07944db8..d51e2f1a1 100644
--- a/sphinx/domains/changeset.py
+++ b/sphinx/domains/changeset.py
@@ -9,8 +9,7 @@
 """
 
 from collections import namedtuple
-from typing import Any, Dict, List
-from typing import cast
+from typing import Any, Dict, List, cast
 
 from docutils import nodes
 from docutils.nodes import Node
@@ -20,7 +19,6 @@ from sphinx.domains import Domain
 from sphinx.locale import _
 from sphinx.util.docutils import SphinxDirective
 
-
 if False:
     # For type annotation
     from sphinx.application import Sphinx