styleci fix

Author: andreaselia

src/Commands/ExportPostmanCommand.php

@@ -432,7 +432,7 @@ protected function handleEdgeCases(array $messages): array
      */
     protected function safelyStringifyClassBasedRule($probableRule): string
     {
-        if (!is_object($probableRule) || is_subclass_of($probableRule, Rule::class) || !method_exists($probableRule, '__toString')) {
+        if (! is_object($probableRule) || is_subclass_of($probableRule, Rule::class) || ! method_exists($probableRule, '__toString')) {
             return '';
         }