[#6783] Fixed a syntax error

Author: wouterj

routing.rst

@@ -481,13 +481,12 @@ that are special: each adds a unique piece of functionality inside your applicat
     Used to set the request format (:ref:`read more <routing-format-param>`).
 
 ``_fragment``
-
- .. versionadded:: 3.2
-    The ``_fragment`` parameter was introduced in Symfony 3.2.
-
     Used to set the fragment identifier, the optional last part of a URL that
     starts with a ``#`` character and is used to identify a portion of a document.
 
+    .. versionadded:: 3.2
+        The ``_fragment`` parameter was introduced in Symfony 3.2.
+
 ``_locale``
     Used to set the locale on the request (:ref:`read more <translation-locale-url>`).