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, 3 insertions, 3 deletions

diff --git a/sphinx/domains/std.py b/sphinx/domains/std.py
index 7ea468404..4bde57930 100644
--- a/sphinx/domains/std.py
+++ b/sphinx/domains/std.py
@@ -12,8 +12,7 @@ import re
 import unicodedata
 import warnings
 from copy import copy
-from typing import Any, Callable, Dict, Iterable, Iterator, List, Optional, Tuple, Union
-from typing import cast
+from typing import Any, Callable, Dict, Iterable, Iterator, List, Optional, Tuple, Union, cast
 
 from docutils import nodes
 from docutils.nodes import Element, Node, system_message
@@ -27,7 +26,7 @@ from sphinx.directives import ObjectDescription
 from sphinx.domains import Domain, ObjType
 from sphinx.locale import _, __
 from sphinx.roles import XRefRole
-from sphinx.util import ws_re, logging, docname_join
+from sphinx.util import docname_join, logging, ws_re
 from sphinx.util.docutils import SphinxDirective
 from sphinx.util.nodes import clean_astext, make_id, make_refnode
 from sphinx.util.typing import RoleFunction
@@ -35,6 +34,7 @@ from sphinx.util.typing import RoleFunction
 if False:
     # For type annotation
     from typing import Type  # for python3.5.1
+
     from sphinx.application import Sphinx
     from sphinx.builders import Builder
     from sphinx.environment import BuildEnvironment