I do not want to create a new markdown file, only to include a line break in salutation "without a paragraph".
I tested everything:
->salutation("Atenciosamente,\n\n{$app}")
->salutation("{!! 'Atenciosamente,<br>' !!}{$app}")
->salutation(nl2br(e('Atenciosamente, <br>')). "{$app}")
...
The simplest solution:
To have a line break without a paragraph, you will need to use two trailing spaces with one enter.