code: function(results, filename, options) {
          var messages = results.messages,
              output = "";
          options = options || {};
  
          /**
           * Capitalize and return given string.
           * @param str {String} to capitalize
           * @return {String} capitalized
           */
          var capitalize = function(str) {
              return str.charAt(0).toUpperCase() + str.slice(1);
          };
  
          if (messages.length === 0) {
              return options.quiet ? "" : filename + ": Lint Free!";
          }
  
          CSSLint.Util.forEach(messages, function(message, i) {
              if (message.rollup) {
                  output += filename + ": " + capitalize(message.type) + " - " + message.message + "\n";
              } else {
                  output += filename + ": " + "line " + message.line + 
                      ", col " + message.col + ", " + capitalize(message.type) + " - " + message.message + "\n";
              }
          });
      
          return output;
      }
docs: Given CSS Lint results for a file, return output for this format.
  @param results {Object} with error and warning messages
  @param filename {String} relative file path
  @param options {Object} (Optional) specifies special handling of output
  @return {String} output for results