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/util/docutils.py b/sphinx/util/docutils.py
index 3ba7813b6..7831f267c 100644
--- a/sphinx/util/docutils.py
+++ b/sphinx/util/docutils.py
@@ -15,8 +15,7 @@ from copy import copy
 from distutils.version import LooseVersion
 from os import path
 from types import ModuleType
-from typing import Any, Callable, Dict, Generator, IO, List, Optional, Set, Tuple
-from typing import cast
+from typing import IO, Any, Callable, Dict, Generator, List, Optional, Set, Tuple, cast
 
 import docutils
 from docutils import nodes
@@ -24,7 +23,7 @@ from docutils.io import FileOutput
 from docutils.nodes import Element, Node, system_message
 from docutils.parsers.rst import Directive, directives, roles
 from docutils.parsers.rst.states import Inliner
-from docutils.statemachine import StateMachine, State, StringList
+from docutils.statemachine import State, StateMachine, StringList
 from docutils.utils import Reporter, unescape
 
 from sphinx.errors import SphinxError
@@ -37,6 +36,7 @@ report_re = re.compile('^(.+?:(?:\\d+)?): \\((DEBUG|INFO|WARNING|ERROR|SEVERE)/(
 if False:
     # For type annotation
     from typing import Type  # for python3.5.1
+
     from sphinx.builders import Builder
     from sphinx.config import Config
     from sphinx.environment import BuildEnvironment