text: 
  var hl = require('highlight.js')
  
  module.exports = exports = function (jade) {
    // add highlighting filter to jade
  
    jade.filters.js = function (str) {
      str = str.replace(/\\n/g, '\n');
      var ret = hl.highlight('javascript', str).value;
      var code = '<pre><code class="javascript">' + ret.replace(/\n/g, '\\n') + '</code></pre>';
      return code;
    }
  
    jade.filters.bash = function (str) {
      var ret = hl.highlight('bash', str.replace(/\\n/g, '\n')).value;
      var code = '<pre><code class="bash">' + ret + '</code></pre>';
      return  code
    }
  
  }
  