test: restore test assertions and fix CI blank-line formatting

Author: rodrigo.nogueira

async_lru/__init__.py

@@ -48,6 +48,7 @@
 class AlruCacheLoopResetWarning(UserWarning):
     """Emitted once per cache instance when a loop change triggers an auto-reset."""
 
+
 @final
 class _CacheParameters(TypedDict):
     typed: bool

tests/test_thread_safety.py

@@ -28,6 +28,7 @@ async def cached_func(key: str) -> str:
     assert cached_func.cache_info().hits == 0
     assert cached_func.cache_info().misses == 1
 
+
 @pytest.mark.filterwarnings("ignore::async_lru.AlruCacheLoopResetWarning")
 def test_cross_loop_preserves_stats_reset() -> None:
     @alru_cache(maxsize=100)