Routing: add explanation for the "_fragment" parameter

Alexis Lefebvre · Alexis Lefebvre · commit 34de06a0e320 · 2016-07-29T17:51:24.000+02:00
diff --git a/routing.rst b/routing.rst
@@ -475,6 +475,10 @@ that are special: each adds a unique piece of functionality inside your applicat
 ``_format``
     Used to set the request format (:ref:`read more <routing-format-param>`).
 
+``_fragment``
+    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.
+
 ``_locale``
     Used to set the locale on the request (:ref:`read more <translation-locale-url>`).
 
