[D6] "Custom JavaScript configuration" field description is wrong

Custom javascript configuration field's current description is:

Add the following code snippet to change available fonts in combo boxes in CKEditor:

fontSize_sizes = '16/16px;24/24px;48/48px;'
font_names = 'Arial;Times New Roman;Verdana'

So based on this description, I have tried to add:
baseClass = 'myclass myclass2'
But this does not work anymore.

Now the correct way seems to be:
config.baseClass = 'myclass myclass2';