package and depencies

vendor/symfony/mime/Encoder/QpContentEncoder.php

@@ -46,15 +46,10 @@ final class QpContentEncoder implements ContentEncoderInterface
         // transform =0D=0A to CRLF
         $string = str_replace(["\t=0D=0A", ' =0D=0A', '=0D=0A'], ["=09\r\n", "=20\r\n", "\r\n"], $string);
 
-        switch (\ord(substr($string, -1))) {
-            case 0x09:
-                $string = substr_replace($string, '=09', -1);
-                break;
-            case 0x20:
-                $string = substr_replace($string, '=20', -1);
-                break;
-        }
-
-        return $string;
+        return match (\ord(substr($string, -1))) {
+            0x09 => substr_replace($string, '=09', -1),
+            0x20 => substr_replace($string, '=20', -1),
+            default => $string,
+        };
     }
 }