Re: [whatwg/url] Double-encoded IDNA labels don't roundtrip (#603)

@rmisev Indeed! As evident in UTS 46, the _CheckHyphens_ boolean was first introduced to allow YouTube labels of form "r3---sn-apo3qvuoxuxbt-j5pe". (Previously it was always "true".) But I suppose the Unicode folks didn't consider the possibility of `xn--`, which now needs to be forbidden explicitly.

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Received on Monday, 17 May 2021 23:01:45 UTC