ES6 generator shortcut notation breaks

[Verdier]

The following:

let a = {
 *gen() {
  }
}

result in:

let a = { * gen() {

    }
};

and:

let a = {
    notGen() {

    },
    * gen() {

    }
};

result in:

let a = {
    notGen() {

        },
        * gen() {

        }
};

[bitwiseman]

@Verdier - I'm sorry this will not make it into this release.
While this is not beautiful, it is also not a syntax error.

[bitwiseman]

http://es6-features.org/#MethodProperties
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Method_definitions

[bitwiseman]

#941