docs: function htmlStringNodeHeader(scope, node, k) {
    var nodeName = node.uid || 's-'+scope.uid
    var s = '<div class="node" id="n-'+htmlEscape(nodeName)+'" data-nodes="show" data-code="hide">'
    if (k != 0)
      s += '<div class="node-name" style="padding-left: '+k*10+'px;">'+htmlEscape(node.name)+' '+node.lines[0]+','+node.lines[1]+'</div>'
    return s
  }