Fix doctool command and references to classes.xml

community/contributing/updating_the_class_reference.rst

@@ -119,13 +119,13 @@ When classes are modified in the source code, the documentation template might b
 
 ::
 
-    ./bin/godot.x11.tools.64 -doctool doc/base/classes.xml
+    ./bin/godot.x11.tools.64 --doctool .
 
-The doc/base/classes.xml should then be up-to-date with current Godot Engine features. You can then check what changed using the ``git diff`` command. If there are changes to other classes than the one you are planning to document, please commit those changes first before starting to edit the template:
+The xml files in doc/classes should then be up-to-date with current Godot Engine features. You can then check what changed using the ``git diff`` command. If there are changes to other classes than the one you are planning to document, please commit those changes first before starting to edit the template:
 
 ::
 
-    git add doc/base/classes.xml
+    git add doc/classes/*.xml
     git commit -m "Sync classes reference template with current code base"
 
 You are now ready to edit this file to add stuff.