python: Sort imports with isort.

Fixes #2665.

Regenerated by tabbott with `lint --fix` after a rebase and change in
parameters.

Note from tabbott: In a few cases, this converts technical debt in the
form of unsorted imports into different technical debt in the form of
our largest files having very long, ugly import sequences at the
start.  I expect this change will increase pressure for us to split
those files, which isn't a bad thing.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

tools/documentation_crawler/documentation_crawler/commands/crawl_with_status.py

@@ -1,8 +1,9 @@
 import optparse
-from scrapy.crawler import Crawler
-from scrapy.commands import crawl
 from typing import List, Union
 
+from scrapy.commands import crawl
+from scrapy.crawler import Crawler
+
 
 class Command(crawl.Command):
     def run(self, args: List[str], opts: optparse.Values) -> None:

tools/documentation_crawler/documentation_crawler/spiders/check_documentation.py

@@ -1,6 +1,5 @@
 import os
 import pathlib
-
 from typing import List
 
 from .common.spiders import BaseDocumentationSpider

tools/documentation_crawler/documentation_crawler/spiders/check_help_documentation.py

@@ -1,12 +1,10 @@
 import os
-
 from posixpath import basename
+from typing import Any, List, Set
 from urllib.parse import urlparse
 
 from .common.spiders import BaseDocumentationSpider
 
-from typing import Any, List, Set
-
 
 def get_images_dir(images_path: str) -> str:
     # Get index html file as start url and convert it to file uri

tools/documentation_crawler/documentation_crawler/spiders/common/spiders.py

@@ -1,7 +1,8 @@
 import json
 import re
-import scrapy
+from typing import Callable, Iterable, List, Optional, Union
 
+import scrapy
 from scrapy.http import Request, Response
 from scrapy.linkextractors import IGNORED_EXTENSIONS
 from scrapy.linkextractors.lxmlhtml import LxmlLinkExtractor
@@ -9,8 +10,6 @@ from scrapy.spidermiddlewares.httperror import HttpError
 from scrapy.utils.url import url_has_any_extension
 from twisted.python.failure import Failure
 
-from typing import Callable, Iterable, List, Optional, Union
-
 EXCLUDED_URLS = [
     # Google calendar returns 404s on HEAD requests unconditionally
     'https://calendar.google.com/calendar/embed?src=ktiduof4eoh47lmgcl2qunnc0o@group.calendar.google.com',