Horizontal line in \frac

[sjmikler]

I use math preview with katex and I don't see horizontal line in between 2 and 3 in expression $' \frac{2}{3} '$. What is wrong?

Also, the thing I really need is support for math inline with $ ... $, instead of $' ... '$. It should be compatible with other markdown editors like hackmd. I saw a topic with a hack of how to make it work, but it didn't seem to work for me. So my question would be, how to make it work in latest version?

[vsch]

@gahaalt, it is a rendering issue in JavaFX for thin lines. If you change the zoom factor in Languages & Frameworks | Markdown to a higher number then it becomes visible:

Zoom: 1.0

Zoom: 1.1

For $...$ syntax see #826