Small fixes based on CI feedback

library/Solarium/Query/Helper.php

@@ -260,7 +260,8 @@ class Solarium_Query_Helper
         return preg_replace_callback(
             $this->_placeHolderPattern,
             array($this, '_renderPlaceHolder'),
-            $query);
+            $query
+        );
     }
 
     protected function _renderPlaceHolder($matches)

tests/Solarium/Query/HelperTest.php

@@ -191,4 +191,10 @@ class Solarium_Query_HelperTest extends PHPUnit_Framework_TestCase
         );
     }
 
+    public function testAssembleInvalidPartNumber()
+    {
+        $this->setExpectedException('Solarium_Exception');
+        $this->_helper->assemble('cat:%1% AND content:%2%',array('value1'));
+    }
+
 }