Description

While looking into generator.yml inheritance I noticed an annoying bug. If you have the following generator.yml in a plugin:

form:
  display:
    "first fieldset name": []
    "second fieldset name": []
    "third fieldset name": []

and then another in module within apps directory

form:
  display:
    "first fieldset name": []
    "new custom fieldset": []
    "second fieldset name": []
    "third fieldset name": []

the "new custom fieldset" will always appear last in the admin edit/new page.

It is because when sfToolkit::arrayDeepMerge is called it doesn't keep the order of the elements.

I think this problem applies to all YAML files that can have inheritance.