text: var CONTINUE = '<!-- continue -->';
  
  module.exports = function excerpt(content, slug)  {
    var splitIdx = content.indexOf(CONTINUE);
    if (splitIdx !== -1) {
      content = content.substring(0, splitIdx);
  
      content += '<p><a href="' + slug + '">Continue reading ...</a></p>';
    }
  
    return content;
  };