The spec doesn't assert there will necessarily be a period, either.
Oh, but it did. It said "after the last period" not "after the last period if there is one".
You assumed. I read what was there.
Perl and PHP are the only programming languages that have a regular expression pattern to match true characters (i.e., graphemes) instead of code points. You just have to know it and use it.
I'll take that bunch of evasive misdirection as an admission that: No. That cannot happen.
And the only [sic] thing here is your overinflated sense of superiority.
In reply to Re^5: Truncating after the last period
by BrowserUk
in thread Truncating after the last period
by sdyates
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