Error in metric.compute: missing `original_instructions` argument
{'login': 'zphang', 'id': 1668462, 'node_id': 'MDQ6VXNlcjE2Njg0NjI=', 'avatar_url': 'https://avatars.githubusercontent.com/u/1668462?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/zphang', 'html_url': 'https://github.com/zphang', 'followers_url': 'https://api.github.com/users/zphang/followers', 'following_url': 'https://api.github.com/users/zphang/following{/other_user}', 'gists_url': 'https://api.github.com/users/zphang/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/zphang/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/zphang/subscriptions', 'organizations_url': 'https://api.github.com/users/zphang/orgs', 'repos_url': 'https://api.github.com/users/zphang/repos', 'events_url': 'https://api.github.com/users/zphang/events{/privacy}', 'received_events_url': 'https://api.github.com/users/zphang/received_events', 'type': 'User', 'site_admin': False}
[{'id': 2067393914, 'node_id': 'MDU6TGFiZWwyMDY3MzkzOTE0', 'url': 'https://api.github.com/repos/huggingface/datasets/labels/metric%20bug', 'name': 'metric bug', 'color': '25b21e', 'default': False, 'description': 'A bug in a metric script'}]
{'login': 'lhoestq', 'id': 42851186, 'node_id': 'MDQ6VXNlcjQyODUxMTg2', 'avatar_url': 'https://avatars.githubusercontent.com/u/42851186?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/lhoestq', 'html_url': 'https://github.com/lhoestq', 'followers_url': 'https://api.github.com/users/lhoestq/followers', 'following_url': 'https://api.github.com/users/lhoestq/following{/other_user}', 'gists_url': 'https://api.github.com/users/lhoestq/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/lhoestq/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/lhoestq/subscriptions', 'organizations_url': 'https://api.github.com/users/lhoestq/orgs', 'repos_url': 'https://api.github.com/users/lhoestq/repos', 'events_url': 'https://api.github.com/users/lhoestq/events{/privacy}', 'received_events_url': 'https://api.github.com/users/lhoestq/received_events', 'type': 'User', 'site_admin': False}
[{'login': 'lhoestq', 'id': 42851186, 'node_id': 'MDQ6VXNlcjQyODUxMTg2', 'avatar_url': 'https://avatars.githubusercontent.com/u/42851186?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/lhoestq', 'html_url': 'https://github.com/lhoestq', 'followers_url': 'https://api.github.com/users/lhoestq/followers', 'following_url': 'https://api.github.com/users/lhoestq/following{/other_user}', 'gists_url': 'https://api.github.com/users/lhoestq/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/lhoestq/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/lhoestq/subscriptions', 'organizations_url': 'https://api.github.com/users/lhoestq/orgs', 'repos_url': 'https://api.github.com/users/lhoestq/repos', 'events_url': 'https://api.github.com/users/lhoestq/events{/privacy}', 'received_events_url': 'https://api.github.com/users/lhoestq/received_events', 'type': 'User', 'site_admin': False}]
I'm running into an error using metrics for computation in the latest master as well as version 0.2.1. Here is a minimal example:

```python
import nlp
rte_metric = nlp.load_metric('glue', name="rte")
rte_metric.compute(
    [0, 0, 1, 1],
    [0, 1, 0, 1],
)
```

```
    181             # Read the predictions and references
    182             reader = ArrowReader(path=self.data_dir, info=None)
--> 183             self.data = reader.read_files(node_files)
    184 
    185             # Release all of our locks

TypeError: read_files() missing 1 required positional argument: 'original_instructions'
```

I believe this might have been introduced with cc8d2508b75f7ba0e5438d0686ee02dcec43c7f4, which added the `original_instructions` argument. Elsewhere, an empty-string default is provided--perhaps that could be done here too?
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