In a comment I wrote, I was surprised to see something I didn't write showing up, in the form of a third dot.
So, where did the third dot come from?
Well, markdown-it has an extension where "typographic replacements" are done. You can see them all in action here (tick typographer on and off).
So, wherever two or more dots are written, even if around quotes, three dots will be rendered ('..' => '..')
While it may seem nice, this is more trouble than good IMHO. Not to mention the fact that people using other apps, utilizing other markdown implementations, will not see what others see (which is why some of you probably had no idea what the hell I was talking about at the start of this post).
It is my opinion that use of non-standard markdown extensions should be kept to a minimum, or preferably not used at all. And since a new UI is going to be written (which may open the possibility to use a high-quality markdown Rust crate), this should be a deliberate implementation choice going forward.