Pages that are prefix of another page or space break the import

When there is a page that is a prefix of another page or a space like "test" and "testpage", the importer fails with a NumberFormatException like NumberFormatException: For input string: "testpage.1699447953. The reason for this is that the importer wrongly considers the directory of the space and pages that just start with the name (like test2 for test) as revisions of the page but then fails to properly extract the revision number from them.