Update components/cache.rst

Author: Nyholm

components/cache.rst

@@ -198,7 +198,7 @@ Serializing Data
 When an item is stored in the cache, it is serialised to a string. It is a class
 implementing :class:`Symfony\\Component\\Cache\\Marshaller\\MarshallerInterface`
 that is responsible for serializing and unserializing. Or to be technically correct:
-to ``marshall()``and to ``unmarshall()``.
+to ``marshall()`` and to ``unmarshall()``.
 
 The :class:`Symfony\\Component\\Cache\\Marshaller\\DefaultMarshaller` is using PHP's
 ``serialize()`` or ``igbinary_serialize()`` if the Igbinary extension is installed.