Merge branch '3.3' into 3.4

* 3.3:
  fixing build

Author: weaverryan

frontend.rst

@@ -81,7 +81,7 @@ Assetic is a pure PHP library that helps to process & optimize your assets (simi
 to Encore). Even though we recommend using Encore, Assetic still works great. For
 a comparison, see :doc:`/frontend/encore/versus-assetic`.
 
-For more about Assetic, see :doc:`/assetic`.
+For more about Assetic, see :doc:`/frontend/assetic`.
 
 Other Front-End Articles
 ------------------------

frontend/encore/versus-assetic.rst

@@ -1,7 +1,7 @@
 Encore Versus Assetic?
 ======================
 
-Symfony originally shipped with support for :doc:`Assetic </assetic>`: a
+Symfony originally shipped with support for :doc:`Assetic </frontend/assetic>`: a
 pure PHP library capable of processing, combining and minifying CSS and JavaScript
 files. And while Encore is now the recommended way of processing your assets, Assetic
 still works well.