Evaluation of empty strings with MAUVE results in error

Hi, I'm currently using HF wrapper to evaluate strings with MAUVE: https://huggingface.co/spaces/evaluate-metric/mauve

I'm getting the following an error when passing empty strings (e.g. `""`). Is this an expected behavior? I would think that the empty string could be considered a valid string and therefore could be evaluated with MAUVE?

```
File "src/main.py", line 194, in
main()
File "src/main.py", line 185, in main
mauve_results_local, mauve_results_global = evaluate(
File "/mnt/aiongpfs/projects/ai-art/global-decoding/global-decoding/src/eval/evaluate.py", line 58, in evaluate
mauve_results_global = mauve.compute(
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/evaluate/module.py", line 462, in compute
output = self._compute(**inputs, **compute_kwargs)
File "/home/users/dgareev/.cache/huggingface/modules/evaluate_modules/metrics/evaluate-metric--mauve/653f4690bcc6e9e16df42f9f85bd0f1b59cca1ae2864058dceedc595f26f6705/mauve.py", line 136, in _compute
out = compute_mauve(
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/mauve/compute_mauve.py", line 87, in compute_mauve
p_features = get_features_from_input(
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/mauve/compute_mauve.py", line 176, in get_features_from_input
features = featurize_tokens_from_model(MODEL, tokenized_texts, batch_size, name).detach().cpu().numpy()
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/torch/utils/_contextlib.py", line 115, in decorate_context
return func(*args, **kwargs)
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/mauve/utils.py", line 114, in featurize_tokens_from_model
outs = model(input_ids=padded_chunk,
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/torch/nn/modules/module.py", line 1511, in _wrapped_call_impl
return self._call_impl(*args, **kwargs)
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/torch/nn/modules/module.py", line 1520, in _call_impl
return forward_call(*args, **kwargs)
File "/mnt/aiongpfs/projects/ai-art/global-decoding/lib/python3.8/site-packages/transformers/models/gpt2/modeling_gpt2.py", line 777, in forward
input_ids = input_ids.view(-1, input_shape[-1])
RuntimeError: cannot reshape tensor of 0 elements into shape [-1, 0] because the unspecified dimension size -1 can be any value and is ambiguous
```