In this specific scenario, libraries using a third-party vendor for authority and bib updates would sometimes have trailing spaces in the update file for the matching point (i.e. 010$a for authority).  When the existing Koha data doesn't have space, it makes matching and cataloging maintenance a bit difficult.

Right now, the work around for these libraries is to cleanup existing data (either add or remove the space - in most cases, remove space) and making sure that the incoming data will find a match.

It would be nice if we could add another normalization rule to ignore trailing spaces in Record Matching Rules.