docs: function processNodeContentWithPosthtml(node, options) {
  	return function (content) {
  		return processWithPostHtml(options.plugins, path.join(path.dirname(options.from), node.attrs.href), content, [function (tree) {
  			// remove <content> tags and replace them with node's content
  			return tree.match(match('content'), function () {
  				return node.content || '';
  			});
  		}]);
  	};
  }