Add a syntax error to the integration test to ensure it's caught

Author: nickdaugherty

ruleset_test.inc

@@ -175,4 +175,6 @@ include( 'non-php-file.svg' ); // NOK. Error. Including non-php file.
 
 echo file_get_contents( 'non-php-file.svg' ); // XSS OK. Preferred way of including SVG/CSS file. WP_Filesystem Warning.
 
-?> <!-- closing PHP tag should be omitted -->
+thisisasyntaxerror! // Bad. Error.
+
+?> <!-- closing PHP tag should be omitted -->

ruleset_test.php

@@ -51,6 +51,7 @@
 		166 => 1,
 		170 => 1,
 		174 => 1,
+		178 => 1,
 	),
 	'warnings' => array(
 		9   => 1,
@@ -265,4 +266,3 @@ private function error_warning_message( $expected, $type, $number, $line ) {
 } else {
 	exit( 1 );
 }
-