To rephrase my previous post: I'm going to prepare an addition about Unicode in RegExes. Stay tuned.
Great. Especially the zero-width space can be useful for sorting purposes. (placing it at the beginning of a tag)
The reason for me suggesting the \p{P} thingy was similar.
It's often difficult to distinguish straight vs. curly apostrophes and quotes, let alone use the keyboard to type the curly versions.
But that may be a rare situation.
And the fact that it will match both dots, commas, and apostrophes probably makes it less useful.
So maybe that was just not a good idea.