EDTF sets beginning or ending with .. do not get the range closed between processing each date field value

[kspurgin]

To test this, the EDTF widget form settings must have Permit date sets: true

If you enter the following values in the same repeatable date field:

[1667,1668,1670..1672]
[..1760-12-03]
[1760-12..]
[1760-01,1760-02,1760-12..]
[1667,1760-12]

You get this display:

one of the dates: 1667, 1668, 1670 until 1672
one of the dates: 1667, 1668, 1670 until 1672, December 3, 1760 or some earlier date
one of the dates: 1667, 1668, 1670 until 1672, December 3, 1760 or some earlier date, December , 1760 or some later date
one of the dates: 1667, 1668, 1670 until 1672, December 3, 1760 or some earlier date, December , 1760 or some later date, January , 1760, February , 1760, December , 1760 or some later date
one of the dates: 1667, 1668, 1670 until 1672, December 3, 1760 or some earlier date, December , 1760 or some later date, January , 1760, February , 1760, December , 1760 or some later date, 1667, December , 1760

Admittedly, this is a super edgey edge case and it does warn you not to use sets, so I'd call this really low priority. But it was interesting to stumble upon. :-)

[kspurgin]

meta-issue: #1748