Fix flake8 errors on updated jsonschema stubs

stubs/jsonschema/jsonschema/_format.pyi

@@ -1,15 +1,15 @@
 from collections.abc import Iterable
 from typing import Any, Callable, TypeVar
 
-F = TypeVar("F", bound=Callable[..., Any])
+_F = TypeVar("_F", bound=Callable[..., Any])
 
 class FormatChecker:
-    checkers: dict[str, tuple[Callable[[Any], bool], Exception | tuple[Exception, ...],],]
+    checkers: dict[str, tuple[Callable[[Any], bool], Exception | tuple[Exception, ...]]]
 
     def __init__(self, formats: Iterable[str] | None = ...) -> None: ...
-    def checks(self, format: str, raises: Exception | tuple[Exception, ...] = ...) -> Callable[[F], F]: ...
+    def checks(self, format: str, raises: Exception | tuple[Exception, ...] = ...) -> Callable[[_F], _F]: ...
     @classmethod
-    def cls_checks(cls, format: str, raises: Exception | tuple[Exception, ...] = ...) -> Callable[[F], F]: ...
+    def cls_checks(cls, format: str, raises: Exception | tuple[Exception, ...] = ...) -> Callable[[_F], _F]: ...
     def check(self, instance: Any, format: str) -> None: ...
     def conforms(self, instance: Any, format: str) -> bool: ...
 

stubs/jsonschema/jsonschema/exceptions.pyi

@@ -1,11 +1,11 @@
 from _typeshed import Self
 from collections import deque
-from collections.abc import Container
-from typing import Any, Callable, Iterable, Sequence
+from collections.abc import Callable, Container, Iterable, Sequence
+from typing import Any
 
 from jsonschema import _utils, protocols
 
-RelevanceFuncType = Callable[[ValidationError], Any]
+_RelevanceFuncType = Callable[[ValidationError], Any]
 
 WEAK_MATCHES: frozenset[str]
 STRONG_MATCHES: frozenset[str]
@@ -78,8 +78,8 @@ class ErrorTree:
     @property
     def total_errors(self): ...
 
-def by_relevance(weak: Container[str] = ..., strong: Container[str] = ...) -> RelevanceFuncType: ...
+def by_relevance(weak: Container[str] = ..., strong: Container[str] = ...) -> _RelevanceFuncType: ...
 
-relevance: RelevanceFuncType
+relevance: _RelevanceFuncType
 
-def best_match(errors: Iterable[ValidationError], key: RelevanceFuncType = ...): ...
+def best_match(errors: Iterable[ValidationError], key: _RelevanceFuncType = ...): ...