style: apply Ruff formatting

src/blackout_notifier/clients.py

@@ -114,14 +114,11 @@ class EitaaClient:
         try:
             body = response.json()
         except requests.JSONDecodeError as error:
-            raise ExternalServiceError(
-                f"Eitaa returned invalid JSON for chat {chat_id}"
-            ) from error
+            raise ExternalServiceError(f"Eitaa returned invalid JSON for chat {chat_id}") from error
         if not isinstance(body, dict) or body.get("ok") is not True:
             description = body.get("description") if isinstance(body, dict) else None
             raise ExternalServiceError(
-                f"Eitaa rejected the message for chat {chat_id}: "
-                f"{description or 'unknown error'}"
+                f"Eitaa rejected the message for chat {chat_id}: {description or 'unknown error'}"
             )
 
 

src/blackout_notifier/config.py

@@ -88,16 +88,13 @@ def _bill_chat_map(raw_routes: str) -> dict[str, tuple[str, ...]]:
             malformed.append(route)
             continue
         if not bill_id.isdecimal():
-            raise ConfigurationError(
-                f"BILL_CHAT_MAP bill IDs must be decimal: {bill_id}"
-            )
+            raise ConfigurationError(f"BILL_CHAT_MAP bill IDs must be decimal: {bill_id}")
         chat_ids = routes.setdefault(bill_id, [])
         if chat_id not in chat_ids:
             chat_ids.append(chat_id)
     if malformed:
         raise ConfigurationError(
-            "BILL_CHAT_MAP entries must use BILL_ID:CHAT_ID format: "
-            + ", ".join(malformed)
+            "BILL_CHAT_MAP entries must use BILL_ID:CHAT_ID format: " + ", ".join(malformed)
         )
     if not routes:
         raise ConfigurationError("BILL_CHAT_MAP must contain at least one route")

src/blackout_notifier/service.py

@@ -91,9 +91,7 @@ class OutageService:
 
             previous = Outage.from_dict(record["snapshot"])
             if record["status"] == "cancelled":
-                if self._notify(
-                    chat_ids, reactivated_outage_message(bill_id, outage, now), result
-                ):
+                if self._notify(chat_ids, reactivated_outage_message(bill_id, outage, now), result):
                     records[event_id] = _record(outage, now)
                     result.state_changed = True
                 continue
@@ -126,9 +124,7 @@ class OutageService:
             if record["missing_checks"] == 0:
                 record["missing_checks"] = 1
                 result.state_changed = True
-            elif self._notify(
-                chat_ids, cancelled_outage_message(bill_id, previous, now), result
-            ):
+            elif self._notify(chat_ids, cancelled_outage_message(bill_id, previous, now), result):
                 record["status"] = "cancelled"
                 record["missing_checks"] = 2
                 record["notified_at"] = now.isoformat()

tests/test_config.py

@@ -59,6 +59,7 @@ def test_config_rejects_malformed_routes(
     with pytest.raises(ConfigurationError, match="BILL_ID:CHAT_ID"):
         Config.from_env()
 
+
 def test_legacy_single_chat_configuration_is_still_supported(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None: