No support for subscripts and superscripts

In other Markdowns you can write an expression like a2 x^2^ to express simple algebra.

Steps to reproduce

1. Write the text a2 x^2^
2. Click elsewhere to allow the text to render
3. Nothing special happens and we don't get a nice algebra formula

Expected behavior: We should see subscripts and superscripts

Actual behavior: The literal text is rendered instead.

The workaround is to use LaTeX instead $a_2 x^2$

Versions

• Mark Text: v 0.10.21
• OS: MacOS 10.11.6 El Capitan