fix: docs

docs/source/rules.rst

@@ -46,11 +46,11 @@ SPT—EDD规则
 顺排对下一道工序的约束是：最早开始时间
 
 .. code-block:: python
-    backward(operations, next_op_start_until, with_material_kitting_constraint, align_with_same_production_line, latest_start_time, latest_end_time) -> remaining_operations: list[operations],
+    backward(operations, next_op_start_until, with_material_kitting_constraint, align_with_same_production_line, latest_start_time, latest_end_time)
 
 
 .. code-block:: python
-    assign_op(operation, is_critical, direction: str, ) -> chosen_resource, chosen_production_id, chosen_hours,
+    assign_op(operation, is_critical, direction: str)
 
 在顺排中，排的比较紧密的资源往往就是瓶颈资源。