Changed the internal 'if' helper such that it can test not only paths/variable names, but also numeric constants.

This will be helpful for subexpressions later, when testing numeric subexpressions return values,

eg: {{#if (eq 0 (mod @index 3))}}

Also added a test for this.

src/Handlebars/Helpers.php

@@ -88,7 +88,11 @@ class Helpers
                  * @var $args array
                  * @var $source string
                  */
-                $tmp = $context->get($args);
+                if( is_numeric($args) ) {
+                    $tmp = $args;
+                } else {
+                    $tmp = $context->get($args);
+                }
 
                 if ($tmp) {
                     $template->setStopToken('else');