Bug 31883: Filter trim causes false warnings

Bug 31883: Filter trim causes false warnings

Test plan:
Run xt/find-missing-filters.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 246efd2e9b843f3a2920fcf0a0414280e6f1a1c2)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 43ba61af5b5bee76c205506f34f2fe05ef4943d9)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>