Add WeakRef.prototype.constructor

[leobalter]

the WeakRef.prototype.constructor is missing in the proposed specs, add it for consistency with other built-in constructors?

[leobalter]

also, the text should be no more than:

The initial value of WeakRef.prototype.constructor is the intrinsic object %WeakRef%.

[mhofman]

@erights mentions in #55 (comment) that the .constructor property can only appear in appendix B.

[leobalter]

All right, so at least I hope this leads me to the right direction as I'll spend time authoring tests the way it's currently specified then.

[leobalter]

Both WeakRef and FinalizationGroup must only appear on the System object

@erights please clarify if FinializationGroup.prototype.constructor should not exist as well?

The proposed specs currently have:

• no WeakRef.prototype.constructor
• a defined FinalizationGroup.prototype.constructor

Is that correct?

[littledan]

Following the conclusion of the "Annex B reform" topic, I think we should retain the FinalizationGroup.prototype.constructor property as is, and add an inline normative optional WeakRef.prototype.constructor property of %WeakRef%. I'll make a PR for this.