Suggested correction to https://www.w3.org/TR/activitypub/
1. I noticed an inaccuracy in section 6.9. "Undo Activity"
"The undo activity and the activity being undone must both have the same author."
"author" should be changed to "actor" here so it will read:
"The undo activity and the activity being undone must both have the same actor."
2. Actually, the "author" property is used (informally ?!) in examples of this document, but I didn't find _any_ reference to such a "property" in https://www.w3.org/TR/activitystreams-vocabulary/
the latter documents uses "actor" instead.
Looks like autor should be replaced with "actor" in examples also to avoid confusion and incompatible implementations...
?!