Code cleanup.

app/Notifications/User/BillReminder.php

@@ -45,8 +45,6 @@ class BillReminder extends Notification
 
     /**
      * Create a new notification instance.
-     *
-     * @return void
      */
     public function __construct(Bill $bill, string $field, int $diff)
     {
@@ -61,12 +59,12 @@ class BillReminder extends Notification
      * @param mixed $notifiable
      *
      * @return array
+     *
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function toArray($notifiable)
     {
         return [
-            //
         ];
     }
 
@@ -76,6 +74,7 @@ class BillReminder extends Notification
      * @param mixed $notifiable
      *
      * @return MailMessage
+     *
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function toMail($notifiable)
@@ -87,7 +86,8 @@ class BillReminder extends Notification
 
         return (new MailMessage())
             ->markdown('emails.bill-warning', ['field' => $this->field, 'diff' => $this->diff, 'bill' => $this->bill])
-            ->subject($subject);
+            ->subject($subject)
+        ;
     }
 
     /**
@@ -96,6 +96,7 @@ class BillReminder extends Notification
      * @param mixed $notifiable
      *
      * @return SlackMessage
+     *
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function toSlack($notifiable)
@@ -106,12 +107,14 @@ class BillReminder extends Notification
         }
         $bill = $this->bill;
         $url  = route('bills.show', [$bill->id]);
+
         return (new SlackMessage())
             ->warning()
             ->attachment(static function ($attachment) use ($bill, $url) {
                 $attachment->title((string)trans('firefly.visit_bill', ['name' => $bill->name]), $url);
             })
-            ->content($message);
+            ->content($message)
+        ;
     }
 
     /**
@@ -120,11 +123,12 @@ class BillReminder extends Notification
      * @param mixed $notifiable
      *
      * @return array
+     *
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function via($notifiable)
     {
-        /** @var User|null $user */
+        /** @var null|User $user */
         $user     = auth()->user();
         $slackUrl = null === $user ? '' : app('preferences')->getForUser(auth()->user(), 'slack_webhook_url', '')->data;
         if (is_array($slackUrl)) {
@@ -133,6 +137,7 @@ class BillReminder extends Notification
         if (UrlValidator::isValidWebhookURL((string)$slackUrl)) {
             return ['mail', 'slack'];
         }
+
         return ['mail'];
     }
 }