Unfortunately this will not work in such way. Wordpress always format your lines, so if you have empty line in code - it will show it as empty paragraph on site. 

you can try to disable https://rehubdocs.wpsoul.com/docs/rehub-theme/how-to/how-to-prevent-wrong-formatting-in-shortcode/

but it's not recommended. 

Hi Igor,

Again (I think) a very simple customization question which I can't find the answer to.

I'm using the shortcodes which you've developed within your theme (box with number). I just want to have a header (or regular text in bold) in the first line and then have the text start in the second line. You can see the screenshots where I provided a screenshot of the layout on the website + the code in classic editor.

I've already tried to delete the 'white break line' wordpress puts in the code but it does not help.

Do you have a simple solution? Thank you very much in advance Igor.

Kind regards,

Steijn