fix: exception message

Co-authored-by: MGatner <mgatner@icloud.com>

system/Filters/Filters.php

@@ -531,7 +531,7 @@ private function registerArguments(string $name, array $arguments, bool $check =
         if ($arguments !== []) {
             if ($check && array_key_exists($name, $this->arguments)) {
                 throw new ConfigException(
-                    '"' . $name . '" has already arguments: '
+                    '"' . $name . '" already has arguments: '
                     . (($this->arguments[$name] === null) ? 'null' : implode(',', $this->arguments[$name]))
                 );
             }