es6_arrow_functions transform leads to syntax error

[unlight]

// a.js
const dummyAnswer = type => {
  return {
    dataset: function (name, query) {
      return 1;
    },
  };
};

grit apply es6_arrow_functions ./grit --dry-run

    -const dummyAnswer = type => {
    -  return {
    -    dataset: function (name, query) {
    -      return 1;
    -    },
    +const dummyAnswer = (type) => {
    +    dataset: (name, query) => {
    +  return 1;
    +},
       };
    -};

Result:

const dummyAnswer = (type) => {
    dataset: (name, query) => {
  return 1;
},
  };

node a.js => SyntaxError: Unexpected token '}'

[morgante]

Thanks for the report, fixed in #239.