style: fix linter and docs errors

falcon/routing/compiled.py

@@ -22,17 +22,17 @@
 import re
 from threading import Lock
 from typing import (
-    TYPE_CHECKING,
     Any,
     Callable,
     Dict,
     List,
     Optional,
     Pattern,
     Set,
-    Union,
     Tuple,
     Type,
+    TYPE_CHECKING,
+    Union,
 )
 
 from falcon.routing import converters
@@ -43,7 +43,7 @@
 from falcon.util.sync import wrap_sync_to_async
 
 if TYPE_CHECKING:  # TODO: switch to TYPE_CHECKING once support for py3.5 is dropped
-    from falcon.request import Request
+    from falcon import Request
 
     _CxElement = Union['_CxParent', '_CxChild']
     _MethodDict = Dict[str, Callable]

falcon/routing/util.py

@@ -15,8 +15,9 @@
 """Routing utilities."""
 
 from __future__ import annotations
+
 import re
-from typing import Optional, Dict, Callable
+from typing import Callable, Dict, Optional
 
 from falcon import constants
 from falcon import responders