Update codebase to Python 3.10 using pyupgrade

kitty_tests/__init__.py

@@ -15,7 +15,6 @@ import time
 from contextlib import contextmanager, suppress
 from functools import wraps
 from pty import CHILD, STDIN_FILENO, STDOUT_FILENO, fork
-from typing import Optional
 from unittest import TestCase
 
 from kitty.config import finalize_keys, finalize_mouse_mappings
@@ -91,7 +90,7 @@ class Callbacks:
     def color_profile_popped(self, x) -> None:
         pass
 
-    def cmd_output_marking(self, is_start: Optional[bool], data: str = '') -> None:
+    def cmd_output_marking(self, is_start: bool | None, data: str = '') -> None:
         if is_start:
             self.last_cmd_at = monotonic()
             self.last_cmd_cmdline = decode_cmdline(data) if data else data

kitty_tests/fonts.py

@@ -5,10 +5,10 @@ import array
 import os
 import tempfile
 import unittest
+from collections.abc import Iterable
 from functools import lru_cache, partial
 from itertools import repeat
 from math import ceil
-from typing import Iterable
 
 from kitty.constants import is_macos, read_kitty_resource
 from kitty.fast_data_types import (

kitty_tests/main.py

@@ -9,14 +9,13 @@ import subprocess
 import sys
 import time
 import unittest
-from collections.abc import Generator, Iterator, Sequence
+from collections.abc import Callable, Generator, Iterator, Sequence
 from contextlib import contextmanager
 from functools import lru_cache
 from tempfile import TemporaryDirectory
 from threading import Thread
 from typing import (
     Any,
-    Callable,
     NoReturn,
     Optional,
 )