Fix Twig namespaces

tests/www/TemplateTest.php

@@ -9,10 +9,10 @@
 namespace SimpleSAML\Test\Web;
 
 use PHPUnit\Framework\TestCase;
-
-use \SimpleSAML\Configuration;
-use \SimpleSAML\XHTML\Template;
-use \SimpleSAML\Module;
+use SimpleSAML\Configuration;
+use SimpleSAML\XHTML\Template;
+use SimpleSAML\Module;
+use Twig\Error\SyntaxError;
 
 class TemplateTest extends TestCase
 {
@@ -35,7 +35,7 @@ class TemplateTest extends TestCase
                 try {
                     $t->show();
                     $this->addToAssertionCount(1);
-                } catch (\Twig_Error_Syntax $e) {
+                } catch (SyntaxError $e) {
                     $this->fail($e->getMessage().' in '.$e->getFile().':'.$e->getLine());
                 }
                 ob_end_clean();
@@ -54,7 +54,7 @@ class TemplateTest extends TestCase
                         try {
                             $t->show();
                             $this->addToAssertionCount(1);
-                        } catch (\Twig_Error_Syntax $e) {
+                        } catch (SyntaxError $e) {
                             $this->fail($e->getMessage().' in '.$e->getFile().':'.$e->getLine());
                         }
                         ob_end_clean();