Equation width bugs

[Daniel Shiffman]

We need custom CSS to fix the 100% width issue for fraction or square roots. Here is one:

I started doing something like this here:

.mathhack .katex .mfrac .frac-line {
    width: 10px;
}

https://github.com/shiffman/The-Nature-of-Code/blob/master/stylesheets/pdf/_math.scss#L8

[Daniel Shiffman]

Another one from chapter 1.