2.1.122 [W3C-HTML51] Section 8.2.5.3 Closing elements that have implied end tags

V0311: The rb and rtc elements are not supported and do not cause implied end tags to be generated

The specification states:

 8.2.5.3 Closing elements that have implied end tags
  
     When the steps below require the UA to generate implied end tags, then, while the 
     current node is a dd element, a dt element, an li element, an optgroup element, an 
     option element, a p element, an rb element, an rp element, an rt element, or an rtc 
     element, the UA must pop the current node off the stack of open elements.

EdgeHTML Mode

The rb and rtc elements are not supported and do not cause implied end tags to be generated.