Recognize a <div class="yui-navset"> element as a tab-view AST element.
<div class="yui-navset">
Tab labels are extracted from <ul class="yui-nav"> and tab content from <div class="yui-content">.
<ul class="yui-nav">
<div class="yui-content">
Recognize a
<div class="yui-navset">element as a tab-view AST element.Tab labels are extracted from
<ul class="yui-nav">and tab content from<div class="yui-content">.