[1] Fix #115: add getAttributeNames() · whatwg/dom@fb45d52 (2015-12-03 22:05:16 +09:00 版) <https://github.com/whatwg/dom/commit/fb45d52fd419193ac05f6b19e624e5e62b2e9279>

[2] Fix #115 (again): clarify that getAttributeNames() can return the emp… · whatwg/dom@7b5e052 (2015-12-16 12:18:13 +09:00 版) <https://github.com/whatwg/dom/commit/7b5e05251d243dba499f29ca7034e8471c180886>

[3] Editorial: define attribute list in terms of Infra's list (annevk著, 2017-04-07 17:48:53 +09:00) <https://github.com/whatwg/dom/commit/f88c7a087268f5a9cf55b92c40754107e696d705>