Fix styling

Author: JasonTame

src/Http/Client.php

@@ -59,7 +59,7 @@ private function createClient(): GuzzleClient
         ));
 
         return new GuzzleClient([
-            'base_uri' => rtrim($this->config['base_url'], '/') . '/',
+            'base_uri' => rtrim($this->config['base_url'], '/').'/',
             'timeout' => $this->config['timeout'],
             'connect_timeout' => $this->config['connect_timeout'],
             'verify' => $this->config['verify_ssl'],
@@ -323,7 +323,7 @@ private function parseResponse(ResponseInterface $response): array
 
         if (json_last_error() !== JSON_ERROR_NONE) {
             throw new LangGraphException(
-                'Failed to decode JSON response: ' . json_last_error_msg(),
+                'Failed to decode JSON response: '.json_last_error_msg(),
                 $response->getStatusCode(),
                 null,
                 $response