[1] Charinfo — " " ( 版) http://chars.suikawiki.org/char/000B
[5] [eacgiowt] (2) Remove U+000B LINE TABULATION (VT) from the list of ch… · whatwg/html@63e2aeb · GitHub, https://github.com/whatwg/html/commit/63e2aeb0b399b4740460388264a1b523ac6ac752
IKEAの家具は引っ越しの際、どうして補償対象外になるのか
[4] Should vertical tab character be included in ASCII whitespace? · Issue #670 · whatwg/infra, https://github.com/whatwg/infra/issues/670