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Not applicable to this case, but the addition of the
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character in URL text probably isn't needed anymore with:a { word-break: break-word; hyphens: auto; }
I'm not sure if microcosm applies the same logic to all URL strings or just those with long strings of non-spaced text, but this should work with normal sentence links too, since it should split on the spaces first, only falling back to breaking long words when there's no other opportunity.
Interesting, I didn't see any spaces in the original link, so is UTF-8 whitespace invisible? The original link seemed to have only ASCII characters.