[dom] "If child’s parent is not parent, throw a NotFou..." (#98)

https://dom.spec.whatwg.org/#mutation-algorithms

> If child’s parent is not parent, throw a NotFoundError exception. 

No comments needed.
Please provide a specification in proper English.

---
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/dom/issues/98