The pollForChanges should coalesc (combine/collapse) successive changes done by the same user to the same item. This avoids clutter in the recentchanges table (and thus in the watchlist), and also reduces overhead for notifying client wikis about changes.

Note that some information from the edit comment may be lost; or perhaps the summaries for each edit can be stored in the rc_params field of the recentchanges table and later be used for rendering the RC item be type appropriate hook.

See also https://meta.wikimedia.org/wiki/Talk:Wikidata/Notes/Change_propagation

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=42065