The filter was initially introduced for file replication purposes. Since the returned value is not always used directly, some instances were later converted to an action as part of removing unused variables, and the hook was documented as an action while still being called as a filter in other instances.
This commit aims to correct the discrepancy between the code and the documentation.
Follow-up to [4673], [4817], [4818], [6363], [6551], [13041], [25821], [33154], [33280].
Props Howdy_McGee, nicolefurlan, johnbillion, mhshujon, SergeyBiryukov.
Fixes#57775.
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