how to handle 'ValueError: empty vocabulary; perhaps the documents only contain stop words' in group_similar_strings

[gw00207]

currently I am having to use a try/except clause when using group_similar_strings in case all of the strings only contain stopwords. Is it possible to handle this case differently, e.g. just return all strings ungrouped? or perhaps just a more descriptive error so that I can except and handle OnlyStopwordsError or similar instead of any ValueError. great package, many thanks.

[ParticularMiner]

That makes sense, @gw00207
and is a simple enough addition to make.
Can you create a pull request for this?

[gw00207]

please see #67