Fixed exception message

Author: acrobat

src/CachePlugin.php

@@ -64,7 +64,10 @@ public function __construct(CacheItemPoolInterface $pool, StreamFactory $streamF
         $this->streamFactory = $streamFactory;
 
         if (isset($config['respect_cache_headers']) && $config['respect_response_cache_directives']) {
-            throw new \InvalidArgumentException('You can\'t provide config option "respect_cache_headers" and "respect_response_cache_directives". Use "respect_response_cache_directives" instead.');
+            throw new \InvalidArgumentException(
+                'You can\'t provide config option "respect_cache_headers" and "respect_response_cache_directives". ' .
+                'Use "respect_response_cache_directives" instead.'
+            );
         }
 
         $optionsResolver = new OptionsResolver();