Add <rb> to the list of tags that are implicitly closed.  This is in the W3C spec and html5lib test suite, but not in the WhatWG spec.  I asked on the html5lib-tests project and apparently in that specific case the W3C is more up-to-date than the WhatWG.
Add <rb> to the list of tags that are implicitly closed.  This is in the W3C spec and html5lib test suite, but not in the WhatWG spec.  I asked on the html5lib-tests project and apparently in that specific case the W3C is more up-to-date than the WhatWG.

luoxn28/gumbo-parser,aleksandaratanasov/gumbo-parser,lvchao0428/gumbo-parser,mcanthony/gumbo-parser,abc00/gumbo-parser,Sigil-Ebook/sigil-gumbo,Sigil-Ebook/sigil-gumbo,mcanthony/gumbo-parser,lvchao0428/gumbo-parser,luoxn28/gumbo-parser,kevinhendricks/gumbo-parser,lvchao0428/gumbo-parser,Sigil-Ebook/sigil-gumbo,kevinhendricks/gumbo-parser,lvchao0428/gumbo-parser,mcanthony/gumbo-parser,f123h456/gumbo-parser,google/gumbo-parser,google/gumbo-parser,luoxn28/gumbo-parser,urandu/gumbo-parser,f123h456/gumbo-parser,Sigil-Ebook/sigil-gumbo,Sigil-Ebook/sigil-gumbo,aleksandaratanasov/gumbo-parser,mcanthony/gumbo-parser,luoxn28/gumbo-parser,kevinhendricks/gumbo-parser,google/gumbo-parser,kevinhendricks/gumbo-parser,abc00/gumbo-parser,urandu/gumbo-parser,aleksandaratanasov/gumbo-parser,f123h456/gumbo-parser,f123h456/gumbo-parser,kevinhendricks/gumbo-parser,lvchao0428/gumbo-parser,google/gumbo-parser,urandu/gumbo-parser,abc00/gumbo-parser,google/gumbo-parser,aleksandaratanasov/gumbo-parser,aleksandaratanasov/gumbo-parser,urandu/gumbo-parser,luoxn28/gumbo-parser,mcanthony/gumbo-parser,abc00/gumbo-parser,urandu/gumbo-parser,f123h456/gumbo-parser,abc00/gumbo-parser