`Not_Assigned` category?

I’ve submitted this through http://www.unicode.org/reporting.html, but track it here since it affects this repository.

Both http://www.unicode.org/reports/tr18/#Categories as the latest draft of that document i.e. http://www.unicode.org/reports/tr18/proposed.html#Categories list the following example:

\p{General_Category = Not_Assigned}

However, Not_Assigned is not a valid General_Category name as per the table here: http://unicode.org/reports/tr44/#GC_Values_Table

Suggested fix: use Unassigned instead in the example.

\p{General_Category = Unassigned}

It would be easy enough to add a Not_Assigned alias but I’d rather not if this is indeed a mistake.

Comparez les exemples de General_Category dans Unicode TR18 avec les noms valides de la TR44 General_Category Values Table, en utilisant les sections liées comme point de départ. La tâche est terminée lorsque l’exemple utilise systématiquement le nom de catégorie valide ou que le rapport Unicode confirme qu’aucune modification du dépôt n’est nécessaire.