The newline inside equation is good for Latex but not for VisualEditor
```
\begin{equation}
\int_{\gamma_s}f(z)\,\rd z \to \int_{\gamma_0}f(z)\,\rd z\mbox{ as
}s\to 0.
\end{equation}
```
is traslated to
```
<math display="block">\int_{\gamma_s}f(z)\,\mbox{d} z \to \int_{\gamma_0}f(z)\,\mbox{d} z\mbox{ as
```
}s\to 0.</math>
but the newline among the curly brackets breaks VE
https://en.tuttorotto.org/Course:Complex_Analysis_(Intermediate_Level)/Cauchy%27s_Theorem_and_its_Consequences/The_Fundamental_Theorem_of_Calculus_and_its_converse
To complete this task modify the **MathCheck.py** to remove \n from inside math environments.
Please pull request your changes.