Hugo will parse
(c) to ©, and
(r) to ®. But some times, it is not what I want.
If it is in the text, I can use
\(c\) to disable it. But in some cases, it is not working well.
For example, when using MathJax:
$$ AveP = \int_0^1 p(r) dr $$
There will be a ® in the equation, which makes me crazy!