Add missing Oxford comma

getting_started/step_by_step/ui_main_menu.rst

@@ -203,9 +203,10 @@ need two containers as children of our ``HBoxContainer``: a
    You should have four nested containers, and the TextureRect nodes
    sitting aside from it
 
-In the node tree, select all the ``TextureRect`` nodes that should go on
-the left side: the logo, the menu options (Continue, NewGame, Options) and the version note. Drag and
-drop them into the ``VBoxContainer``. The nodes should position automatically.
+In the node tree, select all the ``TextureRect`` nodes that should go on the
+left side: the logo, the menu options (Continue, NewGame, Options), and the
+version note. Drag and drop them into the ``VBoxContainer``. The nodes should
+position automatically.
 
 .. figure:: img/ui_main_menu_containers_step_2.png