[1] Remove radiusY and rotation arguments from arcTo() method (annevk著, 2018-01-23 19:24:14 +09:00) <https://github.com/whatwg/html/commit/539326ca4a81757dc077ce96a2be05b192bb0f8c>

[2] Remove optional 'radiusY' and 'rotation' parameters on CanvasPathMethods.arcTo · Issue #878 · whatwg/html (2018-01-24 12:57:31 +09:00) <https://github.com/whatwg/html/issues/878>

[3] Remove radiusY and rotation from arcTo() method by annevk · Pull Request #3371 · whatwg/html (2018-01-24 12:57:41 +09:00) <https://github.com/whatwg/html/pull/3371>