The very first sentence in the section "Disabling debug data" is:-

"By default AngularJS attaches information about scopes to DOM nodes, and adds CSS classes to data-bound elements. The information that is not included is:"

The emphasised text is the issue. There is no further information on what angular does not include. I think the emphasised phrase should be removed, but not sure if there was some value in describing what information is not included.