Review tool only keeps one version of a review document but gives the impression that it keeps all of them.

[rjsparks]

The review tool maintains only a single image of the review document, kept on disk with no version number. "Revising" the review overwrites that single image, but tell the related Document object that a new version has been created. The views of that object then show the same bits for all versions, leading to confusion.

There's no way to reconstitute earlier versions of the reviews to date. We should either change the UI to note that the review document is mutable (as it currently is on disk) or change the storage to match every other document type and actually keep versions.

[rjsparks]

change the storage to match every other document type and actually keep versions.

is what the code was originally intended to do and is what the reviewers and consumers of the review expect.