Like I said, there was a really long number posted in a comment to an answer on this question. This is now overflowing out of its border thusly:
I am using IE8 running Windows7.
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I don't think there is a valid use case / business case for 50-to-100-character long strings of non-whitespace in comments.
Not until the day comes when we need to tag things
... at which point I will ditch software and go back to art.