Cannot match on title if file extension included

[steveroot]

match: {{ title == 'filename.pdf' }} fails to match but
match: {{ title == 'filename' }} does match

The clue to me spotting why the full file name did not match was in the logs,
[INFO] [paperless.handlers] Assigning correspondent SupplierX to 2026-01-02T11:07:11+00:00 papertest
see how the filename doesn't have .pdf at the end?

Probably, the guide needs more examples of matches that will work.

I'm not sure I can fit in time to work out the pull request to add to the docs but I'll add it to my to do list
I still haven't figured out how to use a regex on the match criteria and if I do I'll add that here for others.