[NFC] polish...

[NFC] polish colossalai/auto_parallel/tensor_shard/deprecated/op_handler/strategy_generator.py code style (#2695)
Co-authored-by: shenggan <csg19971016@gmail.com>

colossalai/auto_parallel/tensor_shard/deprecated/op_handler/strategy_generator.py

-from dataclasses import dataclass
 from abc import ABC, abstractmethod
-from typing import List, Dict
+from dataclasses import dataclass
+from typing import Dict, List
+
 from colossalai.device.device_mesh import DeviceMesh
 
 __all__ = ['IntermediateStrategy', 'StrategyGenerator']
@@ -9,7 +10,7 @@ __all__ = ['IntermediateStrategy', 'StrategyGenerator']
 @dataclass
 class IntermediateStrategy:
     """
-    IntermediateStrategy contains the subset of meta information for ShardingStrategy. It is 
+    IntermediateStrategy contains the subset of meta information for ShardingStrategy. It is
     to store the essential information regarding the tensor sharding and leave other meta information to OperatorHandler.
 
     Args:
@@ -24,7 +25,7 @@ class IntermediateStrategy:
 
 class StrategyGenerator(ABC):
     """
-    StrategyGenerator is used to generate the same group of sharding strategies. 
+    StrategyGenerator is used to generate the same group of sharding strategies.
     """
 
     def __init__(self, device_mesh: DeviceMesh):
@@ -39,7 +40,7 @@ class StrategyGenerator(ABC):
     @abstractmethod
     def validate(self, *args, **kwargs) -> bool:
         """
-        Validate if the operands are of desired shape. 
+        Validate if the operands are of desired shape.
         If True, means this generator can be used for the current operation.
         """
         pass