fix:change multichoice_continuations_start_space category

[AnikiFan]

I have moved multichoice_continuations_start_space from generation parameter to base_params, since it is one of the arguments of TransformersModelConfig instead of GenerationParameters.
Before changing it, run the command
'lighteval accelerate <path to lighteval/examples/model_configs/transformers_model.yaml> "leaderboard|arc:challenge|0|0"' will get below error:

[2025-03-11 09:19:30,141] [    INFO]: PyTorch version 2.6.0 available. (config.py:54)
[2025-03-11 09:19:33,984] [ WARNING]: Detected kernel version 5.4.0, which is below the recommended minimum of 5.5.0; this can cause the process to hang. It is recommended to upgrade the kernel to the minimum version or higher. (other.py:335)
╭─────────────────────────────── Traceback (most recent call last) ────────────────────────────────╮
│ lighteval/src/lighteval/main_accelerate.py:162 in accelerate                │
│                                                                                                  │
│   159 │   │   # We extract the model args                                                        │
│   160 │   │   args_dict = {k.split("=")[0]: k.split("=")[1] for k in config["base_params"]["mo   │
│   161 │   │                                                                                      │
│ ❱ 162 │   │   args_dict["generation_parameters"] = GenerationParameters.from_dict(config)        │
│   163 │   │                                                                                      │
│   164 │   │   # We store the relevant other args                                                 │
│   165 │   │   args_dict["base_model"] = config["merged_weights"]["base_model"]                   │
│                                                                                                  │
│ lighteval/src/lighteval/models/model_input.py:60 in from_dict               │
│                                                                                                  │
│    57 │   │   │   │   }                                                                          │
│    58 │   │   │   }                                                                              │
│    59 │   │   """                                                                                │
│ ❱  60 │   │   return GenerationParameters(**config_dict.get("generation", {}))                   │
│    61 │                                                                                          │
│    62 │   @classmethod                                                                           │
│    63 │   def from_model_args(cls, model_args: str):                                             │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
TypeError: GenerationParameters.__init__() got an unexpected keyword argument 'multichoice_continuations_start_space'

[NathanHB]

Thanks for the fix !

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[AnikiFan]

🤗