refactor: coding standards missmatch

[hanoii]

I always try to adhere to the coding standard of the project but I found that a lot of files have missmatch of things.

One in particular is a bit annoying as my editor does this by default so I end up with crazy diffs:

From: https://www.php-fig.org/psr/psr-12/

There MUST NOT be trailing whitespace at the end of lines.
All PHP files MUST end with a non-blank line, terminated with a single LF.

I might submit a PR just fixing this