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, 2 insertions, 3 deletions

diff --git a/sphinx/directives/other.py b/sphinx/directives/other.py
index f55f95219..8158f56a8 100644
--- a/sphinx/directives/other.py
+++ b/sphinx/directives/other.py
@@ -7,8 +7,7 @@
 """
 
 import re
-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 Element, Node
@@ -21,7 +20,7 @@ from sphinx import addnodes
 from sphinx.deprecation import RemovedInSphinx40Warning, deprecated_alias
 from sphinx.domains.changeset import VersionChange  # NOQA  # for compatibility
 from sphinx.locale import _
-from sphinx.util import url_re, docname_join
+from sphinx.util import docname_join, url_re
 from sphinx.util.docutils import SphinxDirective
 from sphinx.util.matching import Matcher, patfilter
 from sphinx.util.nodes import explicit_title_re