Lazily evaluate blocks pragmas.

The specific example in the docs page about what does not work, is exactly what we need
to make this useful.

Fixes #264

test/Mustache/Test/Functional/InheritanceTest.php

@@ -433,6 +433,40 @@ class Mustache_Test_Functional_InheritanceTest extends PHPUnit_Framework_TestCas
         $this->assertEquals('default content', $tpl->render($data));
     }
 
+    public function testInheritanceWithLazyEvaluation()
+    {
+        $partials = array(
+            'parent' => '{{#items}}{{$value}}ignored{{/value}}{{/items}}',
+        );
+
+        $this->mustache->setPartials($partials);
+
+        $tpl = $this->mustache->loadTemplate(
+            '{{<parent}}{{$value}}<{{ . }}>{{/value}}{{/parent}}'
+        );
+
+        $data = array('items' => array(1, 2, 3));
+
+        $this->assertEquals('<1><2><3>', $tpl->render($data));
+    }
+
+    public function testInheritanceWithLazyEvaluationWhitespaceIgnored()
+    {
+        $partials = array(
+            'parent' => '{{#items}}{{$value}}\n\nignored\n\n{{/value}}{{/items}}',
+        );
+
+        $this->mustache->setPartials($partials);
+
+        $tpl = $this->mustache->loadTemplate(
+            '{{<parent}}\n\n\n{{$value}}<{{ . }}>{{/value}}\n\n{{/parent}}'
+        );
+
+        $data = array('items' => array(1, 2, 3));
+
+        $this->assertEquals('<1><2><3>', $tpl->render($data));
+    }
+
     /**
      * @dataProvider getIllegalInheritanceExamples
      * @expectedException Mustache_Exception_SyntaxException