matrix should use pascal syntax for newline

https://www.freepascal.org/docs-html/ref/refse8.html

```
 'the string starts here'#10'   and continues here'
```

> The C construct of escaping characters in the string (using a backslash) is not supported in Pascal.

Currently the test and example solution both use `\n` , they can instead use `#10`
