Do not put a space within function* generator functions.

[ckknight]

In ECMAScript 6, there is support for generator functions in the following form:

function* generate() {
  yield 1;
  yield 2;
}

or

var generate = function* () {
  yield 1;
  yield 2;
}

Unless I'm mistaken, there isn't a way to prevent a space from being inserted between function and *, which is what I would like to have.

Ideally, this would be an option so that users can choose between function* name() {}, function *name() {}, function*name() {}, and function * name() {} - though I prefer the former.

Along these lines, unnamed function expressions should be supported in a similar fashion, i.e. function* () {}, function*() {}, function *() {}, function * () {}.

[Kingles]

+1

This would be awesome for co and koa.

[bitwiseman]

I think implementing support for function* name() {} and function* () {} would be enough for now. The option to control it would come later.

[villadora]

+1 That would be reallly useful.

[haoxins]

+1