[feature/twig] Fix template_test.php

Various tests were broken completely, and some things such as whitespace
changed with Twig

PHPBB3-11598

tests/template/templates/loop_vars.html

@@ -11,4 +11,3 @@ last
 <!-- IF inner.S_LAST_ROW and inner.S_ROW_COUNT and inner.S_NUM_ROWS -->last inner<!-- ENDIF -->
 <!-- END inner -->
 <!-- END loop -->
-<!-- IF .loop.inner -->inner loop<!-- ENDIF -->