Recently line numbers are enabled for displaying site wide .css and .js files, a nice tweak, but even the fact the line numbers feature was developed over the years now that it is enabled for broader use the fact the actual numbers in RTL wikis are in right side feels very unnatural as having line numbers on right makes tracking of actual lines to line numbers difficult. If we consider the line numbers a part of user interface not content (which I think they are in gray zone) we should turn the numeral they use from 123456789 to ۱۲۳۴۵۶۷۸۹ for Persian wiki for example which I believe is in a wrong direction.
Example link:
https://fa.wikipedia.org/wiki/مدیاویکی:Common.js?uselang=fa
Screenshot trying to explain the line to line number tracking issue, that isn't an issue in LTR that there is no wide blank space between the code and line numbers.

