code: function() {
  			var $el = $(this.el);
  			$el.render(this.model.toJSON(), {
  				toggle: { checked: function(p) {
  				      p.element.checked = this.completed;
  				    }
  				  }
  				});
  
  			$el.toggleClass('completed', this.model.get('completed'));
  
  			this.input = this.$('.edit');
  			return this;
  		}
docs: Re-render the titles of the todo item.