@Curator Underscores ( _ ) also work to separate words, but ONLY underscores. Anything but underscores, letters, and numbers will cut the hashtag off at the first non-usable symbol: #this_will_work, but #this-will-not (it will show up under #this).
@noelle :O who knew
@Curator @noelle actually, middle dot also works, #like·this
https://github.com/mastodon/mastodon/blob/78a6b871fe3dae308380ea88132ddadc86a1431e/app/models/tag.rb#L29