Adding failing test showing callable output being treated as template code

tests/test_pystache.py

@@ -81,6 +81,14 @@ class TestPystache(unittest.TestCase):
         ret = pystache.render(template, context)
         self.assertEquals(ret, '{{hello}}')
 
+    def test_tag_in_labda_output(self):
+        template = '{{#test}}Blah{{/test}}'
+        context = {
+            'test': lambda x: '{{hello}}'
+        }
+        ret = pystache.render(template, context)
+        self.assertEquals(ret, '{{hello}}')
+
     def test_section_in_value(self):
         template = '{{test}}'
         context = { 'test': '{{#hello}}' }