Sometimes I come across an old post which does not use MathJax. Is it OK to edit such a post if the edit improves readability?
This question (and its answers) motivated this post. I know some users aren't fond of bumping old questions, so I thought I'd check.
$ $around a variable is not really that important. But posts where the user used no LaTeX formatting and extensive pseudo-TeX clearly can benefit in terms of readability with the edit. $\endgroup$