[Serializer] Fix CS

Author: dunglas

components/serializer.rst

@@ -284,11 +284,11 @@ Ignoring Attributes
 -------------------
 
 .. versionadded:: 2.3
-The :method:`Symfony\\Component\\Serializer\\Normalizer\\GetSetMethodNormalizer::setIgnoredAttributes`
+    The :method:`Symfony\\Component\\Serializer\\Normalizer\\GetSetMethodNormalizer::setIgnoredAttributes`
     method was introduced in Symfony 2.3.
 
 .. versionadded:: 2.7
-Prior to Symfony 2.7, attributes were only ignored while serializing. Since Symfony
+    Prior to Symfony 2.7, attributes were only ignored while serializing. Since Symfony
     2.7, they are ignored when deserializing too.
 
 As an option, there's a way to ignore attributes from the origin object. To remove