Merge branch '3.4' into 4.2

* 3.4:
  [Contributing] Fixed a wrong reference
  Removed the deprecated factory YAML config

Author: javiereguiluz

contributing/code/standards.rst

@@ -268,7 +268,7 @@ Documentation
 * When adding a new class or when making significant changes to an existing class,
   an ``@author`` tag with personal contact information may be added, or expanded.
   Please note it is possible to have the personal contact information updated or
-  removed per request to the doc:`core team </contributing/code/core_team>`.
+  removed per request to the :doc:`core team </contributing/code/core_team>`.
 
 License
 ~~~~~~~