Fix quotes in exception messages

Author: fabpot

ExpressionLanguage.php

@@ -41,7 +41,7 @@ public function __construct($cache = null, array $providers = [])
                 @trigger_error(sprintf('Passing an instance of %s as constructor argument for %s is deprecated as of 3.2 and will be removed in 4.0. Pass an instance of %s instead.', ParserCacheInterface::class, self::class, CacheItemPoolInterface::class), E_USER_DEPRECATED);
                 $cache = new ParserCacheAdapter($cache);
             } elseif (!$cache instanceof CacheItemPoolInterface) {
-                throw new \InvalidArgumentException(sprintf('Cache argument has to implement %s.', CacheItemPoolInterface::class));
+                throw new \InvalidArgumentException(sprintf('Cache argument has to implement "%s".', CacheItemPoolInterface::class));
             }
         }
 

Tests/ExpressionLanguageTest.php

@@ -96,7 +96,7 @@ public function testCachedParseWithDeprecatedParserCacheInterface()
     public function testWrongCacheImplementation()
     {
         $this->expectException('InvalidArgumentException');
-        $this->expectExceptionMessage('Cache argument has to implement Psr\Cache\CacheItemPoolInterface.');
+        $this->expectExceptionMessage('Cache argument has to implement "Psr\Cache\CacheItemPoolInterface".');
         $cacheMock = $this->getMockBuilder('Psr\Cache\CacheItemSpoolInterface')->getMock();
         new ExpressionLanguage($cacheMock);
     }