Concat only unique fields in DatasetInfo.from_merge
{'login': 'mariosasko', 'id': 47462742, 'node_id': 'MDQ6VXNlcjQ3NDYyNzQy', 'avatar_url': 'https://avatars.githubusercontent.com/u/47462742?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/mariosasko', 'html_url': 'https://github.com/mariosasko', 'followers_url': 'https://api.github.com/users/mariosasko/followers', 'following_url': 'https://api.github.com/users/mariosasko/following{/other_user}', 'gists_url': 'https://api.github.com/users/mariosasko/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/mariosasko/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/mariosasko/subscriptions', 'organizations_url': 'https://api.github.com/users/mariosasko/orgs', 'repos_url': 'https://api.github.com/users/mariosasko/repos', 'events_url': 'https://api.github.com/users/mariosasko/events{/privacy}', 'received_events_url': 'https://api.github.com/users/mariosasko/received_events', 'type': 'User', 'site_admin': False}
[]
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['Hi @mariosasko,\r\nJust came across this PR and I was wondering if we can use\r\n`description = "\\n\\n".join(OrderedDict.fromkeys([info.description for info in dataset_infos]))`\r\n\r\nThis will obviate the need for `unique` and is almost as fast as `set`. We could have used `dict` inplace of `OrderedDict` but it\'s available 3.7+ onwards'
 "Hi,\r\n\r\nlet's see what @lhoestq thinks. Although my approach adds more code, it's more readable IMO."
 "Yeah, that's true. Your approach is more readable."]
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I thought someone from the community with less experience would be interested in fixing this issue, but that wasn't the case.

Fixes #2103 
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