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
To complete this task modify the MathCheck.py to remove \n from inside math environments.
Please pull request your changes.