At https://phabricator.wikimedia.org/T47126 Verdy_p wrote:
"So I think that writing "[[Link]]s" (or "[[Target|Link]]s") instead of "[[Target|Links]]" (or "[[Link|Links]]") is just an old (deprecated) trick of MediaWiki used by (lazy) wiki redactors, we cannot recommand using it:"
I think this may be of a wider interest. Is [[Link]]s syntax really deprecated? I never read about this anywhere.
From when?
Is it subject to removal? Should all guides be updated and links corrected by bot?