TeX: Inline math being ignored causes unnecessary false positives

**What got flagged?**
```latex
\begin{document}
If $a+b=c$, then something else.
If something, then $x^2+y^2=z^2$.
\end{document}
```
The first line triggers "Don't use a space before a comma", while the second line triggers "Unnecessary space at the end of the sentence".

**Why is this incorrect?**
Inline math should be considered part of the text. It seems that the math element is just being ignored which leads to many false positives in math heavy texts.

**Example of correct usage:**
Instead of ignoring inline math it could be treated as a math object.

Reproduce the two false positives using the LaTeX example in the issue, then trace how inline math is handled and why it is ignored. Done means inline math is treated as part of the surrounding text or as a math object, without triggering these incorrect spacing warnings.

Written by the indexing model from the issue text.