Not all disscussions on github are in English and some like Persian, Hebrew or Arabic are written from right to left.
It would be easy to add a checkmark to the editor to switch the direction from LTR to RTL and then represent that piece of text in UI from right to left.

This would dramatically improve the usability and enhance UX. For instance, take a look at this issue on an open source Persian font project. The text is barely readable if it's mixed with an English word (which happens quite a lot in a technical disscussion) and all it needs is a div wrapper with dir='rtl' align='right' or if you want to do it with CSS direction: rtl; text-align: right.

I can still write all my comments in HTML and add dir='rtl' align='right' but then I lose the ability to use markdown which is painful. Try writing a simple uordered list in html instead of makrdown and you'll feel the pain, let alone the html table.