Missing parenthesis in documentation's code sample for preinitialize on Collections

[binlabs]

There is a closing parenthesis missing on line 1897 of index.html. It's a code example in the documentation for using preinitialize on Collections.

Current

class Library extends Backbone.Collection {
  preinitialize() {
    this.on("add", function() {
      console.log("Add model event got fired!");
    }; // Missing parenthesis on this line
  }
}

Fix

class Library extends Backbone.Collection {
  preinitialize() {
    this.on("add", function() {
      console.log("Add model event got fired!");
    });
  }
}

[josegonzalez]

This can be closed.