Policy Details: Merge fixes

Special Rules

This object has special rules which override normal object policy rules:

To view a wiki document, you must also be able to view all of its ancestors. The most-restrictive view policy of this document's ancestors is "Public".
To edit a wiki document, you must also be able to view all of its ancestors.

Object Policy

In detail, this means that these users can take this action, provided they pass all of the checks described above first:

This object is public and can be viewed by anyone, even if they do not have a Phabricator account.