Code examples for set_item_custom_bg_color() is completely wrong

[goatchurchprime]

Your Godot version:
3.2.3

Issue description:
The code examples for set_item_custom_bg_color() and set_item_custom_fg_color() are invalid.

They say:

var some_string = "Some text"
some_string.set_item_custom_bg_color(0,Color(1, 0, 0, 1) # This will set the background color of the first item of the control to red.

But set_item_custom_bg_color is not a member function of type String, it's a member function of type ItemList.

Also the brackets aren't matched.

Just delete these code examples entirely. The functions are simple enough to not need them.

URL to the documentation page:
https://docs.godotengine.org/en/stable/classes/class_itemlist.html#class-itemlist-method-set-item-custom-bg-color