[predefined-counter-styles] Persian Alphabetic and Persian Abjad also used for Arabic

ironymark has just created a new issue for 
https://github.com/w3c/predefined-counter-styles:

== Persian Alphabetic and Persian Abjad also used for Arabic ==
See https://www.w3.org/TR/predefined-counter-styles/#persian-abjad. We
 also need arabic-abjad and arabic-alphabetic. These lettered styles 
are used for numbering in books in Arabic and part of the Office 
document standard. It should be separate Arabic versions of these as 
Arabic Unicode is different to Persian Unicode (e.g. Persian uses: ک 
while Arabic uses: ك).

See https://github.com/w3c/predefined-counter-styles/issues/13
Please do NOT reply to this email. If you'd like to contribute to the 
discussion, please do so at the above link. You will need to subscribe
 yourself to the issue (using the button provided by that page) to 
receive notifications of further comments.