code: function() {
      var childLength = this.children.length,
          multiLine   = childLength > 0;
      
      if (childLength == 1 && this.children[0] instanceof Jaml.TextNode) multiLine = false;
      
      return multiLine;
    }
docs: Returns true if this tag should be rendered with multiple newlines (e.g. if it contains child nodes)
  @return {Boolean} True to render this tag as multi-line