keep newlines after serialization

## Description

Importing and serializing to yaml change the newlines order.
Verify if it's possible to keep this information.

Use this [publiccode.yml](https://code.europa.eu/btsf/moodle-etranslation-filter-plugin/-/blob/main/publiccode.yml) as test.

## Actual Behaviour

Every line would be break after 80 chars.

## Expected Behaviour

Every line should keep the original newline.