/src/main/java/org/htmlunit/html/HtmlUnknownElement.java
if ( hasFeature( CSS_RUBY_DISPLAY_INLINE) ) {   return DisplayStyle.INLINE; }
[Delete]
case HtmlDialog.TAG_NAME: if (hasFeature(CSS_DIALOG_NONE)) { return DisplayStyle.NONE; } break; case HtmlSlot.TAG_NAME: <extra_id_0> return DisplayStyle.CONTENTS; } break; default: } return DisplayStyle.INLINE;