From 7d8fff9571c391aee3dcf7ae73399c292cd3a9ea Mon Sep 17 00:00:00 2001
From: Matias Griese <matias@trilbymedia.com>
Date: Mon, 3 Dec 2018 11:36:42 +0200
Subject: [PATCH] Minor fix, oops

---
 .../src/Grav/Framework/File/Formatter/AbstractFormatter.php   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/system/src/Grav/Framework/File/Formatter/AbstractFormatter.php b/system/src/Grav/Framework/File/Formatter/AbstractFormatter.php
index 852f4e5b2..db7958ccd 100644
--- a/system/src/Grav/Framework/File/Formatter/AbstractFormatter.php
+++ b/system/src/Grav/Framework/File/Formatter/AbstractFormatter.php
@@ -57,8 +57,10 @@ abstract class AbstractFormatter implements FormatterInterface
      */
     public function getSupportedFileExtensions(): array
     {
+        $extensions = $this->getConfig('file_extension');
+
         // Call fails on bad configuration.
-        return $this->getConfig('file_extension');
+        return \is_string($extensions) ? [$extensions] : $extensions;
     }
 
     /**