Hi Mendixteam, this is less a question and more a feedback concerning the AtlasUI Helper classes Overview. (found here -> https://atlas.mendix.com/p/helpers/7881299347899271) The list of classes is out of date, eg. there is no class .spacing-outer-none-right . The actual class in Atlas is called .spacing-outer-right-none. Also some are missing, ie. .display-ie8-only Please update the list, as it is a nice "feature".
I gave feedback about this once and the matter about spacing-outer-none-right should've been fixed in the docs.