/src/main/java/org/htmlunit/html/HtmlUnknownElement.java
if ( hasFeature( MULTICOL_BLOCK) ) {   return DisplayStyle.BLOCK; }
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if (!hasFeature(CSS_RT_DISPLAY_RUBY_TEXT_ALWAYS) && wasCreatedByJavascript() && getParentNode() == null) { return DisplayStyle.BLOCK; } return DisplayStyle.RUBY_TEXT; case HtmlRtc.TAG_NAME: <extra_id_0> && wasCreatedByJavascript() && getParentNode() == null) { return DisplayStyle.BLOCK; } return DisplayStyle.RUBY_TEXT_CONTAINER; case HtmlMultiColumn.TAG_NAME: if (hasFeature(MULTICOL_BLOCK)) {