Comment 5 for bug 827021

I think experiment 4 is the best, the spacing is evenly distributed, but I think ون can use a tiny bit of +ve kerning.

The kerning between رب is important, else it would be mistaken for a space making it read like two words (ر is right joining only so it gets the same shape for middle and final position). The position of ب dot is a bit flexible as long as it is below the base and does not clash with other letters. The extended lower stroke of ع is rather ugly, usually the two strokes have nearly the same length.