code: function plugin(options) {
  
      return function(files, metalsmith, done) {
  
          Object.keys(files).forEach(function(file) {
              var data = files[file];
              data.contents = new Buffer(special(data.contents.toString()));
          });
          done();
      }
  }
docs: Metalsmith plugin to sanitize special unicode chars in html
  
  @param {Object or String} options (optional)
  @return {Function}