Markdown newlines are different from Element

The original Markdown spec describes that newlines should be removed from the input, unless 2 spaces are appended at the end (line break), or more than 1 newlines (new paragraph).
However, many applications use a different flavor, e.g. Github, or Element, where every newline is persisted as is.
This is useful in instant messaging.
Cinny should also preserve these line breaks.