remark-clang-format/tests/resources/code/4.in.md

run clang-format for code in markdown

This is an identity matrix of order 4 × 4:

$$
\begin{matrix}
1&0&0&0\\
0&1&0&0\\
0&0&1&0\\
0&0&0&1
\end{matrix}
$$

```tex
\begin{matrix}
1&0&0&0\\
0&1&0&0\\
0&0&1&0\\
0&0&0&1
\end{matrix}
```