Always use the singular for a WikiName, otherwise multiple pages for one topic might be created.

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[DIFF]

marks older pages that have at least one backup version stored (click for an author diff)

[UPDATED]

marks pages edited since you set your bookmark (click for a bookmark diff)

[NEW]

marks pages created since you set your bookmark, and were not edited after creation

[DELETED]

marks page deletions

[RENAMED]

marks page renames

[CONFLICT]

An editing conflict happened, please resolve it by merging both versions of the problematic paragraphs together.