Rewrites:

- converted single-line if() block to multi-line and with curly braces
- "imported" SPL classes to have unified code style
- always initialize your variables ... :-/
- added some empty lines/spaces for better readability

Signed-off-by: Roland Häder <roland@mxchange.org>

src/Worker/Notifier.php

@@ -498,7 +498,6 @@ class Notifier
 		}
 		DBA::close($delivery_contacts_stmt);
 
-
 		$url_recipients = array_filter($url_recipients);
 		// send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 		// They are especially used for notifications to OStatus users that don't follow us.