diff --git a/extensions/mentions/src/Listener/AddClientAssets.php b/extensions/mentions/src/Listener/AddClientAssets.php
index 956b5e575..3f1ca5094 100755
--- a/extensions/mentions/src/Listener/AddClientAssets.php
+++ b/extensions/mentions/src/Listener/AddClientAssets.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
diff --git a/extensions/mentions/src/Listener/AddPostMentionedByRelationship.php b/extensions/mentions/src/Listener/AddPostMentionedByRelationship.php
index 858ab9916..5fe2ce334 100755
--- a/extensions/mentions/src/Listener/AddPostMentionedByRelationship.php
+++ b/extensions/mentions/src/Listener/AddPostMentionedByRelationship.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
diff --git a/extensions/mentions/src/Listener/FormatPostMentions.php b/extensions/mentions/src/Listener/FormatPostMentions.php
index b96b8d7fa..888da12ae 100755
--- a/extensions/mentions/src/Listener/FormatPostMentions.php
+++ b/extensions/mentions/src/Listener/FormatPostMentions.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
diff --git a/extensions/mentions/src/Listener/FormatUserMentions.php b/extensions/mentions/src/Listener/FormatUserMentions.php
index 07d588521..28b279a95 100755
--- a/extensions/mentions/src/Listener/FormatUserMentions.php
+++ b/extensions/mentions/src/Listener/FormatUserMentions.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
diff --git a/extensions/mentions/src/Listener/UpdateUserMentionsMetadata.php b/extensions/mentions/src/Listener/UpdateUserMentionsMetadata.php
index bbea6750a..b753bf8cc 100755
--- a/extensions/mentions/src/Listener/UpdateUserMentionsMetadata.php
+++ b/extensions/mentions/src/Listener/UpdateUserMentionsMetadata.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
diff --git a/extensions/mentions/src/Notification/PostMentionedBlueprint.php b/extensions/mentions/src/Notification/PostMentionedBlueprint.php
index 76baf59b4..1a9b8cd22 100644
--- a/extensions/mentions/src/Notification/PostMentionedBlueprint.php
+++ b/extensions/mentions/src/Notification/PostMentionedBlueprint.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
@@ -10,9 +11,9 @@
 
 namespace Flarum\Mentions\Notification;
 
-use Flarum\Core\Post;
 use Flarum\Core\Notification\BlueprintInterface;
 use Flarum\Core\Notification\MailableInterface;
+use Flarum\Core\Post;
 
 class PostMentionedBlueprint implements BlueprintInterface, MailableInterface
 {
diff --git a/extensions/mentions/src/Notification/UserMentionedBlueprint.php b/extensions/mentions/src/Notification/UserMentionedBlueprint.php
index c2fc95d34..fdf9a82ae 100644
--- a/extensions/mentions/src/Notification/UserMentionedBlueprint.php
+++ b/extensions/mentions/src/Notification/UserMentionedBlueprint.php
@@ -1,4 +1,5 @@
-<?php 
+<?php
+
 /*
  * This file is part of Flarum.
  *
@@ -10,9 +11,9 @@
 
 namespace Flarum\Mentions\Notification;
 
-use Flarum\Core\Post;
 use Flarum\Core\Notification\BlueprintInterface;
 use Flarum\Core\Notification\MailableInterface;
+use Flarum\Core\Post;
 
 class UserMentionedBlueprint implements BlueprintInterface, MailableInterface
 {
@@ -50,7 +51,7 @@ class UserMentionedBlueprint implements BlueprintInterface, MailableInterface
      */
     public function getData()
     {
-        return null;
+        return;
     }
 
     /**