lint fix

Signed-off-by: gitgud5000 <[email protected]>

Author: gitgud5000

kedro-datasets/kedro_datasets/ibis/table_dataset.py

@@ -140,11 +140,17 @@ def __init__(  # noqa: PLR0913
 
         self._table_name = table_name
         self._database = database
-        # Prefer credentials if provided, else fallback to connection
+        # Prefer credentials if provided, else fallback to connection.
+        # Ensure _connection_config is always a dict[str, Any] for type stability.
+        self._connection_config: dict[str, Any]
         if credentials is not None:
-            self._connection_config = credentials
+            if isinstance(credentials, str):
+                # Treat string credentials as a connection string under key 'con'
+                self._connection_config = {"con": credentials}
+            else:
+                self._connection_config = deepcopy(credentials)
         else:
-            self._connection_config = connection or self.DEFAULT_CONNECTION_CONFIG
+            self._connection_config = deepcopy(connection or self.DEFAULT_CONNECTION_CONFIG)
         self.metadata = metadata
 
         # Set load and save arguments, overwriting defaults if provided.