Added a comma

javiereguiluz · javiereguiluz · commit f581e9c995e3 · 2016-11-29T10:10:10.000+01:00
diff --git a/components/yaml.rst b/components/yaml.rst
@@ -296,7 +296,7 @@ flag::
 Parsing PHP Constants
 ~~~~~~~~~~~~~~~~~~~~~
 
-By default the YAML parser treats the PHP constants included in the contents as
+By default, the YAML parser treats the PHP constants included in the contents as
 regular strings. Use the ``PARSE_CONSTANT`` flag and the special ``!php/const:``
 syntax to parse them as proper PHP constants::
 
