fix: Simplify statements and fix syntax.

To make sure that PHP CS Fixer do not fails.

src/Bundle/ChillMainBundle/Notification/Mailer.php

@@ -104,7 +104,7 @@ class Mailer
      * @param \User $to
      * @param array $subject Subject of the message [ 0 => $message (required), 1 => $parameters (optional), 3 => $domain (optional) ]
      * @param array $bodies The bodies. An array where keys are the contentType and values the bodies
-     * @param \callable $callback a callback to customize the message (add attachment, etc.)
+     * @param callable $callback a callback to customize the message (add attachment, etc.)
      */
     public function sendNotification(
         $recipient,