Delete arabic control characters mark-ar (0x061C) and lefttorightmark (0x200E)

[yanone]

These are invisible control characters and are confusing when part of glyphsets.

I used search-and-replace, so the files should be good despite the characters being invisible.

[yanone]

Could you please publish a package update after merging this? Thank you.

[moyogo]

I think this can be merged. However, knowing these characters are used can still be useful at other level of language support so it would be good to have other opinions.

[yanone]

That's an interesting point. If they shall stay in the language DB, I could instead maybe filter for invisible control characters when assembling the glyphsets, leaving the languages untouched here.

[yanone]

I just implemented a filter for Cc and Cf Unicode category characters in glyphsets and it removes exactly those two plus a third righttoleftmark in Arabic Plus that I didn’t catch earlier.

Personally I’m happy with this and will let you decide whether to close the PR or not.

[simoncozens]

I think control characters don't belong in these lists.