Based on the patch that introduces manual revert detection, this is
to create a software-defined change tag that will be applied to all
edits that restore a page to an exact previous state. This is also
for consistency with mw-undo and mw-rollback that will make a
"reverted" tag appear on reverted edits in the future.
Note about the REST API tests: in the next patch in this chain
I encountered even more issues with comparing returned changed tags
with expectations, so I decided it'd better if we just checked the
change tags applied manually in these tests. Otherwise we can run into
nasty race conditions, as the reverted tag is processed after sending
the response to client in the deferred update. It also makes the test
hard to maintain.
Bug: T256001
Change-Id: Ic367886f39faedcb823222b7d63bf4d5cb236ae9
THis introduces Handler::getRouteUrl() and uses it in
PageHistoryHandler() to generate self-reference links to adjacent
segments of the response.
Bug: T252566
Change-Id: Ie7b2c6cc63c8a499d4714336b917a9e3328294ca
