bug: Non monospace Greek characters

I use the following text in my repo readmes, as well as across my system:

   Ὤ   
 Ὁ   Ν 
Ι̅Ϲ̅ │ Χ̅Ϲ̅
───┼───
ΝΙ │ ΚΑ
   ☦   

If you are using Maple Mono in your browser, you can clearly see that the vertical line is displaced due to leading characters not being monospaced, at least that's my guess.

However, on my system, it works fine as one of my fallback fonts handles these characters properly. Here are some pictures to show how it looks on my end.

• Good

• Bad

Unlike the => issue, this is sadly not just a scaling thing. I understand if these characters are out of the scope of this project, just thought I'd report the bug. Thanks for your great work!