[symfony#2178] Adding missing reference

weaverryan · weaverryan · commit 1e6300160f6e · 2013-01-23T06:43:15.000-08:00
diff --git a/components/yaml/yaml_format.rst b/components/yaml/yaml_format.rst
@@ -267,3 +267,5 @@ Comments can be added in YAML by prefixing them with a hash mark (``#``):
 
     Comments are simply ignored by the YAML parser and do not need to be
     indented according to the current level of nesting in a collection.
+
+.. _YAML: http://yaml.org/
